Rotary Shouldered Connection Thread Inspection System

Prevent Drill String Failures…
   Reduce Costly Rework Charges…
      Ensure Stronger Joint Connections…
          Demand More Than What’s Now Offered for Used Pipe…

Gagemaker’s JSS® Thread Inspection System for Rotary Shouldered Connections is a revolutionary breakthrough in accurately gauging the quality of both new and used rotary shouldered connections. It’s now possible to avoid broken connections by identifying thread damage before it’s visually apparent and unfortunately too late. For years, the industry has relied on the interpretative “fit” of a ring or plug gage although a ring or plug gage will not directly detect variation in pitch diameter. With the JSS™ system, you’ll inspect just a few key attributes and save hours of down time and thousands of dollars in rework charges.

JSS® RSC Inspection Process

Inspect with the Revolutionary JSS® Kit and Make an Immediate Impact on Your Bottom Line

RSC-FullKit-JSS-Package

  • Extend Drill String Longevity
  • Optimize Connection Performance
  • Avoid Fishing for Broken Parts
  • Eliminate Standoff, Lead, and Taper Errors
  • Prevent Stress Cracking and Galling from Improper Make-Up and Excessive Torque
  • Reduce Non-Productive Rig Time Due to String Failure
  • Ensure Exact Thread Cone Interference When Torque Shoulders Make-Up
  • Detect Pitch Diameter Errors that Cause Oversized Boxes and Undersized Pins

 

Insert Identification

Insert-IdentificationThe first step in the quality process is to ensure the  threading insert being used is correct for the job.

Use the JSS Thread Insert Identifier Template to quickly verify that the correct threading insert has been selected as well as check the full topping profile of both internal and external inserts.

A quick mating of the insert to the template ensures the insert is correct for the job.

JSS insert identifiers have multiple notches on each template and are available for all API thread forms.

Gagemaker’s rotary shouldered connection thread insert identifier easily determines which threading insert the machinist is using.

When an optical comparator is unavailable, the insert identifier will show which thread form is on the insert.

Threads Per Inch (TPI)Taper Per Foot (TPF)Thread FormModel
62”V-0.032TI-RSC-60
42” V-0.038RTI-RSC-60
43” V-0.038RTI-RSC-60
53” V-0.040TI-RSC-60
42” V-0.050TI-RSC-60
63” V-0.050TI-RSC-60
61.5”V-0.055TI-RSC-60
42”V-0.065TI-RSC-60
41.5” V-0.076TI-RSC-60
43.373” A-0.094TI-RSC-90
3.52” 90-V-0.050TI-RSC-90
3.53” 90-V-0.050TI-RSC-90
31.25”90-V-0.084TI-RSC-90

Inspection Setup

gagemaker-tdwintaper-box-and-usb-transparent TDWIN Taper™ is the only software program dedicated to the manufacturing and inspection of downhole tubular connections. It has everything you need to machine, inspect, and document tubular connection threads. TDWIN Taper™ relies on API and industry standard tables and tolerances. TDWIN Taper™ displays connection drawings, inspection gage information, and setup and inspection reports. Simply, it is a must have for any machine shop.
TDWIN Taper™ is included in any full JSS Package.

The program includes the following tapered connections:

Rotary Shouldered Connections

  • Acme Regular
  • Acme Streamline
  • API Numbered Connections
  • API Regular
  • Double Streamline
  • External Flush
  • Full Hole
  • Internal Flush
  • H-90poin
  • Open Hole
  • PAC
  • Slim Hole
  • Slimline H-90
  • Wide Open
  • Xtra Hole

Tubing and Casing Connections

  • NUE Tubing
  • EUE Tubing
  • Short Thread Casing
  • Long Thread Casing
  • Buttress Casing
  • USS Improved Buttress Tubing
  • Line Pipe
  • Special Clearance Couplings
  • SR13 Seal Ring Groove Couplings

System Requirements

  • Microsoft Windows XP or newer
  • USB 2.0 port
  • Internet Connection for first use
  • 1 MB RAM or more (recommended)
  • Screen resolution of 1024 X 768 minimum
  • .Net Framework 2.0 or later installed
Features

  • Follows API Specification 7-2, Dec. 2008, for Rotary Shouldered Connections and API Specification 5B, Oct. 2008, for Tubing and Casing Connections
  • Print product blueprints for manufacturing and inspection
  • Print dimensional reports and inspection sheets
  • Provides gage configurations, setting standards, and contact point information

Gagemaker-TDWIN-Taper-Select

1. Select Connection Type

Gagemaker-TDWIN-Taper-Pick

2. Pick Size & View Drawing

Gagemaker-TDWIN-Taper-Pipe

3. Select Pipe End & Review Drawing

Gagemaker-TDWIN-Taper-Gage

4. Choose Gage Type

Gagemaker-TDWIN-Taper-Element

5. Choose Thread Element

Gagemaker-TDWIN-Taper-Review
6. Review & Print Inspection Report

TDWIN Taper is available in single and multi-user models. Multi-user models may be adjusted to a customer specific number. Contact customer service for more information.

System Requirements

  • Microsoft Windows XP or newer
  • USB 2.0 port
  • Internet Connection for first use
  • 1 MB RAM or more (recommended)
  • Screen resolution of 1024 X 768 minimum
  • .Net Framework 2.0 or later installed
User LicensesDescriptionModel
1Thread Disk for Tapered Threads Software, Single User licenseTDWINTaper
2Thread Disk for Tapered Threads Software, no license agreement required, 2 discs shipped, 20% discountTDWINTaper-2USER
5Thread Disk for Tapered Threads Software, Floating site license agreemen, 5 usersTDWINTaper-LIC5
10Thread Disk for Tapered Threads Software, Floating site license agreemen, 10 usersTDWINTaper-LIC10
15Thread Disk for Tapered Threads Software, Floating site license agreemen, 15 usersTDWINTaper-LIC15

Thread Form Inspection

thread_form Thread form accuracy is important if two connectors are to make-up properly. Using a JSS Thread Profile Gage and a JSS Thread Addendum Gage provide a quick check of the thread to ensure that the form is correct. Thread form verification ensures form accuracy. Also, checking thread form will ensure the first imperfect thread is fully deburred.
Thread form is defined as its profile in an axial plane for a length of one pitch. Most importantly, verifying thread form is a recommended inspection for API connections and ensures form accuracy.

Thread Form

Gagemaker manufactures precision tapered thread profile gages for the quick identification of product thread forms. Specify the connection which is to be inspected when ordering. Special profiles will be quoted upon request.

Connection TypeConnection SizeTPITPFThread FormModel
Hughes External Flush2⅜” - 2⅞”62”V-0.032TP-6-2-32
API Full Hole4”42”V-0.038RTP-4-2-38
API Numbered Connections #23 - #50 42”V-0.038RTP-4-2-38
Double Streamline3½” - 5½”42”V-0.038RTP-4-2-38
Hughes External Flush3½” - 4½” 42”V-0.038RTP-4-2-38
Hughes Xtra Hole2⅞” - 5” 42”V-0.038RTP-4-2-38
Hughes Slim Hole2⅜” - 4½” 42”V-0.038RTP-4-2-38
Internal Flush2⅜” - 6⅝”42”V-0.038RTP-4-2-38
Wide Open2⅜" - 4½" 42”V-0.038RTP-4-2-38
API Numbered Connections #56 - #8443”V-0.038RTP-4-3-38
API Full Hole2⅞”, 3½”, & 4½”53”V-0.040TP-5-3-40
API Regular2⅜” - 4½”53”V-0.040TP-5-3-40
API Regular6⅝”42”V-0.050TP-4-2-50
API Full Hole5½” & 6⅝”42”V-0.050TP-4-2-50
API Regular5½”, 7⅝”, & 8⅝”43”V-0.050TP-4-3-50
API Numbered Connections#10, #12, #13, & #16 61.5”V-0.055TP-6-1.5-55
API Regular (Macaroni Tubing)1” - 1.5”61.5”V-0.055TP-6-1.5-55
P.A.C. Connections2⅜” - 3½”41.5”V-0.076TP-4-1.5-76
American Open Hole2⅜” - 4½” 41.5”V-0.076TP-4-1.5-76
Hughes H-903½” - 6⅝” 3.52”90-V-0.050TP-3.5-2-50
Hughes H-907” - 8⅝” 3.53”90-V-0.050TP-3.5-3-50
Hughes Slimline H-902⅜” - 3½” 31.25”90-V-0.084TP-3-1.25-84
Special profiles and overlay charts are available. For information on those available, please contact gagemaker. For Special Overlays, please specify the following: 1. Screen Size, 2. Magnification 20X/50X, and 3. Product Form or Profile Template

External Thread Form Inspection

Internal Thread Form Inspection

Thread Pitch Diameter Inspection

IT-5104-RSCPitch diameter is the most critical measurement in machining threads. The JSS Pitch Diameter Locating Templates and JSS Pitch Diameter Gages give you control over your threading quality. When pitch diameters don’t meet specification, it allows the connection to flex while drilling, ultimately causing galling and connection failure.

Now, operators are able to inspect both new and used pipe threads using precision Pitch Diameter Gages that allow them to pinpoint early signs of stress, perform preventative maintenance, and extend the life of their drill string connections. By measuring the pitch diameters, the operators can directly control the connection’s size during manufacturing, as well as ensure that the thread cones go into interference properly when the connections are torqued together.

In the past, pitch diameter has been ignored as long as the ring or plug gage threaded to an acceptable standoff. Using a pin location profile (LPP) and a PD-8000-RSC Series gage(pin) or a box location profile (LPB) with an IT-5104-RSC (box) provides you plenty of control. The process of locating and measuring the pitch diameter takes less than a minute. This minute of inspection quickly decides the difference between good quality and bad quality.

Pitch Diameter Location

Pitch diameter location templates locate the point on the connection where the pitch diameter is measured. When applied properly to the connection, the template’s special layout mark indicates the proper thread to measure the pitch diameter.

A simple mark with a felt tip marking pen allows the operator or inspector to accurately position the gage and read a diameter. Please specify the threads per inch (TPI), taper per foot (TPF), and thread form when ordering.

Location Profiles- Pin

Connection TypeConnection SizeTPITPFThread FormModel
Hughes External Flush2⅜” - 2⅞”62”V-0.032LPP-6-2-32
API Numbered Connections #23 - #50 42”V-0.038RLPP-4-2-38
API Numbered Connections #56 - #8443”V-0.038RLPP-4-3-38
API Full Hole4”42”V-0.038RLPP4-2-38
Double Streamline3½” - 5½”42”V-0.038RLPP4-2-38
Hughes External Flush3½” - 4½”42”V-0.038RLPP4-2-38
Hughes Slim Hole2⅜” - 4½”42”V-0.038RLPP-4-2-38
Hughes Xtra Hole2⅞” - 5” 42”V-0.038RLPP-4-2-38
Internal Flush2⅜" - 6⅝"42”V-0.038RLPP-4-2-38
Wide Open2⅜" - 4½" 42”V-0.038RLPP4-2-38
API Full Hole2⅞”, 3½”, & 4½”53”V-0.040LPP-5-3-40
API Regular2⅜” - 4½”53”V-0.040LPP-5-3-40
API Full Hole5½” & 6⅝”42”V-0.050LPP-4-2-50
API Regular6⅝” 42”V-0.050LPP-4-2-50
API Regular5½”, 7⅝”, & 8⅝”43”V-0.050LPP-4-3-50
API Numbered Connections #10, #12, #13, & #16 61.5”V-0.055LPP-6-1.5-55
API Regular (Macaroni Tubing)1” - 1.5”61.5”V-0.055LPP-6-1.5-55
American Open Hole2⅜” - 4½” 41.5”V-0.076LPP-4-1.5-76
P.A.C. Connections2⅜” - 3½” 41.5”V-0.076LPP-4-1.5-76
Hughes Slimline H-902⅜” - 3½” 31.25”90-V-0.084LPP-3-1.25-SLH9
Hughes H-903½” - 6⅝” 3.52”90-V-0.050LPP-3.5-2-H9
Hughes H-907” - 8⅝” 3.53”90-V-0.050LPP-3.5-3-H9

Location Profiles- Box

Connection TypeConnection SizeTPITPFThread FormModel
Hughes External Flush2⅜” - 2⅞”62”V-0.032LPB-6-2-32
API Numbered Connections#23 - #50 42”V-0.038RLPB-4-2-38
API Full Hole4”42”V-0.038RLPB4-2-38
Double Streamline3½” - 5½”42”V-0.038RLPB4-2-38
Hughes External Flush3½” - 4½”42”V-0.038RLPB4-2-38
Hughes Slim Hole2⅜”- 4½”42”V-0.038RLPB-4-2-38
Hughes Xtra Hole2⅞” - 5”42”V-0.038RLPB-4-2-38
Internal Flush2⅜” - 6⅝”42”V-0.038RLPB-4-2-38
Wide Open2⅜” - 4½” 42”V-0.038RLPB-4-2-38
API Numbered Connections#56 - #8443”V-0.038RLPB-4-3-38
API Full Hole2⅞”, 3½”, & 4½”53”V-0.040LPB-5-3-40
API Regular2⅜” - 4½”53”V-0.040LPB-5-3-40
API Full Hole5½” & 6⅝”42”V-0.050LPB-4-2-50
API Regular6⅝”42”V-0.050LPB-4-2-50
API Regular5½”, 7⅝”, & 8⅝”43”V-0.050LPB-4-3-50
API Numbered Connections #10, #12, #13, & #16 61.5”V-0.055LPB-6-1.5-55
API Regular (Macaroni Tubing)1” - 1.5”61.5”V-0.055LPB-6-1.5-55
P.A.C. Connections2⅜” - 3½” 41.5”V-0.076LPB-4-1.5-76
American Open Hole2⅜” - 4½” 41.5”V-0.076LPB-4-1.5-76
Hughes H-903½” - 6⅝”3.52”90-V-0.050LPB-3.5-2-H9
Hughes H-907” - 8⅝”3.53”90-V-0.050LPB-3.5-3-H9
Hughes Slimline H-902⅜” - 3½”31.25”90-V-0.084LPB-3-1.25-SLH9
External Pitch Diameter

The ball pitch diameter gages indicate the pitch diameter size of the product’s external thread. The gages are adjustable within a size range and use interchangeable contact points to measure different pitch threads. Gages ship with one set of contact points, please see the points tab to find the proper points. Gages require setting with either a standard or a MIC TRAC. TD Win Taper Software , MIC TRAC , contact points, and standards are sold separately.

RangeContact Points Included*DescriptionModel
0 – 6” (0 mm – 152.4 mm)T144External Pitch Diameter for Tapered ThreadsPD-8001-RSC
6” – 12” (152.4 mm – 304.8 mm)T144External Pitch Diameter for Tapered ThreadsPD-8002-RSC
Internal Pitch Diameter

Gagemaker’s internal pitch diameter gages measure variation in internal thread pitch diameters. Pitch diameter gages are shipped with one set of contact points, please see the points tab to request proper points. Setting dimensions for the pitch diameter gages are provided by the TD Win Taper™ software package. Gages require setting with either a standard or a MIC TRAC™. TD Win Taper Software , MIC TRAC , contact points, and standards are sold separately.

RangeReach/DepthContact Points Included*DescriptionModel
1½” – 10” (38.1 mm – 254 mm)4” (101.6 mm)T144Internal Pitch Diameter Gage for Tapered ThreadsIT-5104-RSC

JSS™ rotary shouldered connection pitch diameter gages require setting. While you can use a MIC TRAC™ setting system, Gagemaker recommends these rod style setting standards to set your rotary shouldered connection pitch diameter gages.

Specify size or specific connection with ordering. Ex: RS-3.5-DS-B, RS-NC77-B, RSS-2.375-REG-B.

Connection NameBox/PinThreads Per Inch (TPI)Taper Per Foot (TPF)Thread FormDescriptionModel
Hughes External FlushBox62”V-0.032Rod Standard for External Flush (2.375″ – 4.5″), BoxRS-__-EF-B
Hughes External FlushPin62”V-0.032Rod Standard for External Flush (2.375″ – 4.5″), BoxRS-__-EF-P
API Full HoleBox42” V-0.038RRod Standard for Full Hole (2.875” – 6.625”), BoxRS-__-FH-B
API Full HolePin42” V-0.038RRod Standard for Full Hole (2.875” – 6.625”), PinRS-__-FH-P
API Numbered Connections #56 - #84Box43” V-0.038RRod Standard for API Numbered Connections (#10 – #77), BoxRS-NC__-B
API Numbered Connections #56 - #84 Pin43” V-0.038RRod Standard for API Numbered Connections (#10 – #77), PinRS-NC__-B
API Numbered Connections #23 - #50 Box42” V-0.038RRod Standard for API Numbered Connections (#10 – #77), BoxRS-NC__-B
API Numbered Connections #23 - #50 Pin42” V-0.038RRod Standard for API Numbered Connections (#10 – #77), PinRS-NC__-B
Double StreamlinePin42” V-0.038RRod Standard for Double Streamline (3.5” – 5.5”), PinRS-__-DS-P
Double StreamlineBox42” V-0.038RRod Standard for Double Streamline (3.5” – 5.5”), BoxRS-__-DS-B
Hughes External FlushBox42”V-0.038RRod Standard for External Flush (2.375″ – 4.5″), BoxRS-__-EF-B
Hughes External FlushPin42”V-0.038RRod Standard for External Flush (2.375″ – 4.5″), BoxRS-__-EF-P
Hughes Slim HoleBox42” V-0.038RRod Standard for Hughes Slim Hole (2.375” – 4.5”), BoxRS-__-SH-B
Hughes Slim HolePin42” V-0.038RRod Standard for Hughes Slim Hole (2.375” – 4.5”), PinRS-__-SH-P
Hughes Xtra Hole Box42” V-0.038RRod Standard for Xtra Hole (2.875″ – 5.0”), BoxRS-__-XH-B
Hughes Xtra Hole Pin42” V-0.038RRod Standard for Xtra Hole (2.875” – 5.0”), PinRS-__-XH-P
Internal FlushBox42” V-0.038RRod Standard for Internal Flush (2.375” – 6.625”), BoxRS-__-IF-B
Internal FlushPin42” V-0.038RRod Standard for Internal Flush (2.375” – 6.625”), PinRS-__-IF-P
Wide OpenBox42” V-0.038RRod Standard for Wide Open (2.375” – 4.5”), BoxRS-__-WO-B
Wide OpenPin42” V-0.038RRod Standard for Wide Open (2.375” – 4.5”), PinRS-__-WO-P
API Full HoleBox53” V-0.040Rod Standard for Full Hole (2.875” – 6.625”), BoxRS-__-FH-B
API Full HolePin53” V-0.040Rod Standard for Full Hole (2.875” – 6.625”), PinRS-__-FH-B
API Full HoleBox42” V-0.050Rod Standard for Full Hole (2.875” – 6.625”), BoxRS-__-FH-B
API Full HolePin42” V-0.050Rod Standard for Full Hole (2.875” – 6.625”), PinRS-__-FH-P
API RegularBox53” V-0.040Rod Standard for Regular (1.0” – 8.625”), BoxRS-__-REG-B
API RegularPin53” V-0.040Rod Standard for Regular (1.0” – 8.625”), PinRS-__-REG-P
API RegularPin43” V-0.050Rod Standard for Regular (1.0” – 8.625”), BoxRS-__-REG-B
API RegularBox43” V-0.050Rod Standard for Regular (1.0” – 8.625”), BoxRS-__-REG-B
API RegularBox42” V-0.050Rod Standard for Regular (1.0” – 8.625”), BoxRS-__-REG-B
API RegularPin42” V-0.050Rod Standard for Regular (1.0” – 8.625”), PinRS-__-REG-P
API Numbered Connections #10, #12, #13, & #16 Pin61.5”V-0.055Rod Standard for API Numbered Connections (#10 – #77), PinRS-NC__-P
API Numbered Connections #10, #12, #13, & #16 Box61.5”V-0.055Rod Standard for API Numbered Connections (#10 – #77), BoxRS-NC__-B
API RegularPin43” V-0.055Rod Standard for Regular (1.0” – 8.625”), PinRS-__-REG-B
API RegularBox43” V-0.055Rod Standard for Regular (1.0” – 8.625”), BoxRS-__-REG-B
American Open HoleBox41.5” V-0.076Rod Standard for Open Hole (2.375” – 4.5”), BoxRS-___-OH-B
American Open HolePin41.5” V-0.076Rod Standard for Open Hole (2.375” – 4.5”), PinRS-___-OH-P
P.A.C. ConnectionsBox41.5” V-0.076Rod Standard for PAC (2.375” – 3.5”), BoxRS-__-PAC-B
P.A.C. ConnectionsPin41.5” V-0.076Rod Standard for PAC (2.375” – 3.5”), PinRS-__-PAC-P
Hughes H-90Box3.52” 90-V-0.050Rod Standard for Hughes H-90 (3.5” – 8.625” ), BoxRS-__-H9-B
Hughes H-90Pin3.52” 90-V-0.050Rod Standard for Hughes H-90 (3.5” – 8.625” ), PinRS-__-H9-P
Hughes H-90Box3.53” 90-V-0.050Rod Standard for Hughes H-90 (3.5” – 8.625” ), BoxRS-__-H9-B
Hughes H-90Pin3.53” 90-V-0.050Rod Standard for Hughes H-90 (3.5” – 8.625” ), PinRS-__-H9-P
Hughes Slimline H-90Box31.25”90-V-0.084Rod Standard for Slimline H-90 (2.375” – 3.5” ), BoxRS-__-SLH9-B
Hughes Slimline H-90Pin31.25”90-V-0.084Rod Standard for Slimline H-90 (2.375” – 3.5” ), PinRS-__-SLH9-B

API Contact Points for Pitch Diameter Gages

Gagemaker’s standard ball contact points are manufactured with carbide balls. All RSC inspection gages use threaded shank contact points. Threaded shanks are #4-48 UNF. Pitch diameter gages require two contact points. Sold individually.

Connection TypeTPIPoint DiameterModel
API Rotary Shouldered Connections4.144"T144
API Rotary Shouldered Connections5.115"T115
API Rotary Shouldered Connections6.096"T096
Hughes H-90.200"T200
Hughes Slimline H-903.235"T235

External Pitch Diameter Location (LPP)

Internal Pitch Diameter Location (LPB)

External Pitch Diameter Inspection

Internal Pitch Diameter Inspection

Thread Lead Inspection

Gagemaker-LG-6001-handThread Lead is one of the most important thread elements to monitor. Not only is lead inspection an industry wide practice for rotary shouldered connections, it is an API Specification 7 mandated requirement. Lead error is most commonly generated by manual and CNC lathes not cutting properly.

Verifying thread lead is within tolerance is a required inspection according to API specification. Application of a Gagemaker Lead Gage to a setting standard and then to the product confirms that the lathe is cutting properly. Lead variation has a direct effect on pitch diameter and how two connectors go together when made up.

Thread lead is the distance between threads, measured on a plane parallel to the centerline of the threaded part. Lead error has a direct effect on functional diameter, stand-off, and thread flank engagement.

Gagemaker’s lead gages inspect pin and box connections for multiple pitches and thread forms. The gages provide dimensional verification of product print data on the thread’s true integrity.

Features:
  • Interchangeable contact points allow inspection on a variety of thread forms and sizes.
  • Inspect RSC threads as well as Tubing and Casing threads
  • Requires presetting using Gagemaker’s lead gage setting standards.

Lead Gages

The lead gage inspects thread lead using contact points that seat in the threads of a part. Thread lead is the distance between threads, measured on a plane parallel to the centerline of the threaded part. The pitch of the thread determines the diameter of the contact points required for taking measurements. API Specification 7-2 requires thread lead inspection.

The LG-6001 and the LG-6002 use a two-point system to inspect thread lead for straight and tapered threads. The LG-6002 inspects both external and internal threads, while the LG-6001 inspects external threads. The two point system allows for a sweeping action to obtain the measurement. Both gages are available with higher resolution indicators.

The LG-5003 uses the three-point system to inspect internal and external thread lead. Two fixed contact points at the rear of the gage and one movable contact point at the front of the gage provide complete stability when taking thread lead measurements. This unique design does not require sweeping to obtain measurements.

Contact points can be easily changed to allow the gage to be used on a variety of thread forms. Each gage comes with one set of contact points.

Before inspecting parts, the lead gage must be preset to a nominal predetermined dimension using a lead gage setting standard. Lead standards are available for both straight and tapered threads. Our setting standards are manufactured according to ANSI and API specifications, respectively.

 ModelThread Length
Range
DescriptionExternal/InternalNumber of
Contact Points
Minimum
Bore
Indicator
Travel
Indicator
Resolution
Contact Point
Spacing
LG-6001-400x230LG-6001½” – 2”
(12.7 mm – 50.8 mm)
2-point external lead gageExternal22.750”.100".0005”.200”
LG-6002LG-6002½” – 4”
(0 mm – 101.6 mm)
2-point internal lead gageInternal21.450”.100".0005”.200”
Gagemaker-LG-5003LG-5003½” – 4”
(0 mm – 101.6 mm)
3-point external/internal lead gageExternal/Internal31.340”.100".0005”.500”

Lead Gage Setting Standards

Gagemaker’s precision lead gage setting standards are manufactured in accordance with API Specification 7-2. Lead gage standards are used to set the gage prior to the inspection.

Connection TypeConnection SizeThreads Per Inch (TPI)Taper Per Foot (TPF)Thread Form Model
Hughes External Flush2⅜” - 2⅞” 62”V-0.032LS-1007
API Numbered Connections #23 - #5042”V-0.038RLS-1007
Double Streamline3½” - 5½”42”V-0.038RLS-1007
API Full Hole4”42”V-0.038RLS-1007
Hughes External Flush3½” - 4½”42”V-0.038RLS-1007
Hughes Slim Hole2⅜” - 4½” 42”V-0.038RLS-1007
Hughes Xtra Hole2⅞” - 5”42”V-0.038RLS-1007
Internal Flush2⅜” - 6⅝” 42”V-0.038RLS-1007
Wide Open2⅜” - 4½” 42”V-0.038RLS-1007
API Numbered Connections #56 - #8443”V-0.038RLS-1008
API Regular2⅜” - 4½”53”V-0.040LS-1009
API Full Hole2⅞”, 3½”, & 4½”53”V-0.040LS-1009
API Regular6⅝” 42”V-0.050LS-1007
API Full Hole5½” & 6⅝” 42”V-0.050LS-1007
API Regular5½”, 7⅝”, & 8⅝” 43”V-0.050LS-1008
API Numbered Connections#10, #12, #13, #1661.5”V-0.055LS-1010
API Regular (Macaroni Tubing)1” - 1.5”61.5”V-0.055LS-1010
American Open Hole2⅜” - 4½” 41.5”V-0.076LS-1010
P.A.C. Connections 2⅜” - 3½” 41.5”V-0.076LS-1010
Hughes H-902⅜” - 6⅝” 3.52”90-V-0.050LS-1011
Hughes H-907” - 8⅝”3.53”90-V-0.050LS-1012
Hughes Slimline H-902⅜” - 3½” 31”90-V-0.084LS-1013
*TPF = Taper Per Foot, TPI = Threads Per Inch

API Contact Points for Lead Gages

Gagemaker’s standard ball contact points are manufactured with carbide balls. All Gagemaker lead gages use threaded shank contact points. Threaded shanks are #4-48 UNF. Lead gages require two or three contact points.

Connection TypeTPIPoint DiameterModel
API Rotary Shouldered Connections4.144"T144
API Rotary Shouldered Connections5.115"T115
API Rotary Shouldered Connections6.096"T096
Hughes H-90.200"T200
Hughes Slimline H-903.235"T235

External Thread Lead Inspection

Internal Thread Lead Inspection

Thread Taper Inspection

Gagemaker IT 6000Thread taper is another inspection required by API Spec 7. For accurate taper inspections, use the JSS Taper Gages to verify that the pin and box connectors will have matching tapers. As connectors are made up, taper errors induce high stresses that eventually can lead to connection failure.

Thread taper is the change in pitch diameter over the length of a connection, typically designated in inches per foot. For all rotary shouldered connections, measuring thread taper is not only an industry wide practice; it is an API mandated inspection.

During the manufacturing process, taper must be accurately measured and quantified to avoid mismatched tapers. When under a service load, mismatched tapers between pins and boxes diminish proper thread engagement resulting in reduced connection performance.

Gagemaker’s IT-6000 and ET-7000 series gages are the best choice for measuring and controlling both pin and box taper values within the required specification limits. When RSC connections are properly manufactured utilizing Gagemakers precision taper gages, product performance is maximized.

External Taper Gages

Gagemaker’s external taper gages inspect variation in connection taper. External taper gages are shipped with .072” diameter contact points unless otherwise requested. Gages for larger diameters are available. Verify the proper contact point for your particular connection. Higher resolution indicators are available.

ModelDescriptionIndicator
Travel
RangeIndicator
Resolution
ET-7003External Taper Gage, 1" travel1"0 - 10" (0 - 254 mm).001”
ET-7003-1External Taper Gage, 1" travel, .0001” resolution1"0 - 10" (0 - 254 mm).0001”
ET-7003-5External Taper Gage, 1" travel, .0005” resolution1"0 - 10" (0 - 254 mm).0005”
Internal Taper Gages

Gagemaker’s internal taper gages measure variation in connection taper. Taper gages are shipped with our standard set of .072” diameter contact points, unless specified otherwise. Gages for larger diameters are available. Verify the proper contact point for your particular connection. Higher resolution indicators are available.

ModelDescriptionDepthRangeIndicator
Travel
Indicator
Resolution
IT-6000Internal Taper Gage4¼”1½” – 9” (38.1 mm – 228.6 mm)1”.001”
IT-6000-5Internal Taper Gage, .0005” Resolution Indicator4¼”1½” – 9” (38.1 mm – 228.6 mm)1”.0005”

API Contact Points for Taper Gages

Gagemaker’s standard contact points are manufactured with carbide balls. Taper gages use threaded shank contact points. Threaded shanks are #4-48 UNF. Taper gages require two contact points and other contact points are available. Sold individually.

Connection TypeTPIPoint DiameterModel
API Rotary Shouldered Connections4.144"T144
API Rotary Shouldered Connections5.115"T115
API Rotary Shouldered Connections6.096"T096
Hughes H-90.200"T200
Hughes Slimline H-903.235"T235

External Thread Taper Inspection

Internal Thread Taper Inspection

Thread Height Inspection

TH-0000-on-Pin-TRAN-Proper thread height maximizes the performance of any threaded connection and is a required inspection by the API. Thread height not only affects the interchangeability but also the integrity of a thread assembly. Thread height is the distance between the crest and the root, normal to the axis of the thread and several issues can be easily detected by simply inspecting thread height.

Gagemaker Thread Height Gages provide immediate feedback on how the thread height compares to the specification requirements. A shallow thread height may allow the connection to pull apart under critical loads.

From detecting a chipped tool to preventing a connection from pulling apart under critical loads, inspecting thread height is valuable. Thread Height Gages inspect both internal and external thread height for a variety of thread forms and provide immediate feedback on the integrity of your threads.

External Thread Height

Gagemaker manufactures external thread height gages. Please specify the thread form when ordering. Gages ship with one contact point (T072), unless specified otherwise. Please verify the proper point for your connection on the points tab before ordering. Standards sold separately.

ModelDescriptionMin. BoreIndicator TravelIndicator ResolutionDial TypeIncluded Contact Point*Standard required
TH-3000-RSCExternal Thread Height Gage, 0-25-0, T0722.930”.250”.0005” 0-25-0, BalancedT072Yes
TH-3000-RSC-1External Thread Height Gage, 0-25-0, .0001” Resolution Indicator, T0723.730”.250".0001”0-25-0, Balanced
T072Yes
TH-3000-RSC-MExternal Thread Height Gage, 0-50-0, Metric Indicator, T0722.930”5 mm.01 mm0-50-0, BalancedT072Yes
*Alternate contact point may be subsituted to match preferred connections. See contact tab for corresponding contact points.
Internal Thread Height

Gagemaker also manufactures internal thread height gages. Please specify the thread form when ordering. Gages ship with one contact point (T072), unless specified otherwise. Please verify the proper point for your connection before ordering. Standards sold separately.

ModelDescriptionMin. BoreIndicator TravelIndicator ResolutionDial TypeIncluded Contact Point*Standard required
TH-3009-RSCInternal Thread Height, 0-25-0, 1" Base Length, T0721.50”.250”.0005”0-25-0, BalancedT072Yes
TH-3009-RSC-1Internal Thread Height, 0-25-0, .0001” Indicator Resolution, 1" Base Length, T0721.50”.250”.0001”0-10-0, BalancedT072Yes
*Alternate contact point may be subsituted to match preferred connections. See contact tab for corresponding contact points.

Thread Height Contact Points 

Gagemaker’s standard contact points are manufactured with carbide balls. Thread height gages require one contact point. Points are sold individually.

Thread FormTaper Per Foot (TPF)Threads Per Inchi (TPI)Ball DiameterDescriptionModel
Hughes H-902, 3.072”.072” Thread height contact point for Rotary Shouldered ConnectionsT072
Hughes Slimline H-9013.072”.072” Thread height contact point for Rotary Shouldered ConnectionsT072
V-0.038R2, 34.072”.072” Thread height contact point for Rotary Shouldered ConnectionsT072
V-0.0556.072”.072” Thread height contact point for Rotary Shouldered ConnectionsT072
V-0.0502, 34.044”.044” Thread height contact point for Rotary Shouldered ConnectionsT044
V-0.0764.044”.044” Thread height contact point for Rotary Shouldered ConnectionsT044
V-0.03226.034”.034” Thread height contact point for Rotary Shouldered ConnectionsT034
V-0.04035.034”.034” Thread height contact point for Rotary Shouldered ConnectionsT034

External Thread Form Inspection

Internal Thread Form Inspection

 

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