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API Spec 7-2 1 REG Regular Rotary Thread Gauges for Inspecting Rotary Shouldered Thread of Drill Pipe Drill Collar

API Spec 7-2 1 REG Regular Rotary Thread Gauges for Inspecting Rotary Shouldered Thread of Drill Pipe Drill Collar

  • Highlight

    API Spec 7-2 rotary thread gauge

    ,

    regular rotary thread gauges

    ,

    drill pipe thread inspection gauge

  • Size
    1 REG
  • Operation Pressure
    API Spec 7-2 REG Thread Gauge
  • Applicable Medium
    Mud, Water, Natural Gas
  • Package
    Wooden Case
  • Warranty
    One Year
  • Customized
    Acceptable
  • Standard
    API 7-2
  • Feature
    Wear&Corrosion&Stable Structure
  • Form Of Thread Inspected
    V-0.055
  • Place of Origin
    Shaanxi, China
  • Brand Name
    KM
  • Certification
    ISO DIN GB RoHS
  • Delivery Time
    50000pieces/Month
  • Payment Terms
    T/T,L/C,D/P,D/A,PayPal,etc.

API Spec 7-2 1 REG Regular Rotary Thread Gauges for Inspecting Rotary Shouldered Thread of Drill Pipe Drill Collar

API Spec 7-2 1 REG Regular Rotary Thread Gauges for Inspecting Rotary Shouldered Thread of Drill Pipe Drill Collar


Description:

API Spec 7-2 1 REG Regular Rotary Thread Ring Plug Gauge is a traditional tapered thread joint designed for oil gas drilling tools, including drill pipe, drill collar and crossover subs. REG connections feature tapered V shape threads with 60° thread angle. Multiple sizes are available from 1 REG up to 8 5/8 REG.
 
REG joints were widely adopted for drilling strings in the early oilfield industry. Currently REG is mostly seen on legacy, older generation drilling equipment and used for repair & overhaul work.


Regular Rotary Connection thread gauges (ring & plug gauges) are measuring instruments manufactured per API Spec 7 2 standard.
Made of GCr15 tool steel with hardness reaching 60 63HRC, delivering high wear resistance, stable dimensional accuracy and long service life. Every gauge is fully inspected and supplied with official calibration certificate before shipment.


Available variants: Working gauge or Master gauge; Ring gauge, Plug gauge or complete Ring & Plug gauge set. 
Some corresponding thread sizes are interchangeable with legacy IF drill string connections.


Quick Detail:

1. Standard: API Spec 7-2
2. Material: GCr15
3. Hardness: 60-63HRC
4. Come with calibration certificate.


When you order, please specify the following information:
1. Type and Sizes of connections
2. Master gauge or working gauge
3. Ring or plug or set


Specification:

Regular Style Gauge

Size Form of Thread Inspected Pitch per 25.4mm Taper Form of Angle Basic Pitch Dia
1 REG V-0.055 4.233(6) 1:8 60° 29.312
1 1/2 REG V-0.055 4.233(6) 1:8 39.141
2 3/8 REG V-0.040 5.080(5) 1:4 60.080
2 7/8 REG V-0.040 5.080(5) 1:4 69.605
3 1/2 REG V-0.040 5.080(5) 1:4 82.293
4 1/2 REG V-0.040 5.080(5) 1:4 110.868
5 1/2 REG V-0.055 6.350(4) 1:4 132.944
6 5/8 REG V-0.055 6.350(4) 1:6 146.248
7 5/8 REG V-0.055 6.350(4) 1:4 170.549
8 5/8 REG V-0.055 6.350(4) 1:4 194.731


Packing & Shipping:

API Spec 7-2 1 REG Regular Rotary Thread Gauges for Inspecting Rotary Shouldered Thread of Drill Pipe Drill Collar

Company profile:

API Spec 7-2 1 REG Regular Rotary Thread Gauges for Inspecting Rotary Shouldered Thread of Drill Pipe Drill Collar

Precautions:

1. It is not allowed to touch the working surface of the gauge with your hands, so as not to cause rust.

2. Inspect regularly to see if there is any damage, rust or deformation. If you find that the gauge begins to rust,

    you should put it in gasoline and soak it for a period of time, then take it out and wipe it carefully, and apply anti-rust oil.

3. Do not save the working surfaces of the two gauges together, otherwise the two working surfaces

    will be glued to each other, and the gauge will be unnecessarily damaged when separated by external force.

4. After used the threaded gauges, it should be wiped clean and stored under dry condition.


Applications:

Regular rotary master gauges are mainly used in the petroleum oil and gas industry.


FAQ:

Q1: What are the structural features of REG thread connections?
A: REG connections adopt tapered V-shape threads with a 60° thread angle. A full range of sizes is available from 1 REG up to 8 5/8 REG. It is a classic thread structure for drill strings in the oilfield industry.
Q2: What standard do REG rotary thread gauges comply with?
A: All Regular Rotary Connection thread gauges (ring gauges and plug gauges) are manufactured in accordance with API Spec 7-2 standard.
Q3: What is the main application industry of REG master thread gauges?
A: Regular rotary master gauges are mainly used in the petroleum and natural gas industry.

Ratings & Review

Overall Rating

5.0
Based on 50 reviews for this supplier

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All Reviews

J
J*
Canada Mar 15.2026
NC35 rotary shouldered connection gauge is super accurate, it perfectly matches the petroleum industry’s high requirements!!