Thread Gauge












Thread Gauge
- All thread inspection after production.
- All thread gauges will be supplied with Calibration Certificate.
- 100 % customer satisfaction for Quality and Reliability.
- Suitable for many kinds of thread and pipes.
- Good package suitable for international transportation.
- Fast lead time and sometimes some commonly used thread may be in stock.
Size Range: 2-3/8 ~ 20 in
Thread: BTC, STC, LTC, EUE, NUE, NC, IF, FH, REG, PH-6, XT, HT-PAC, etc.
Type: Heavy Duty or light
Material: HDPE, steel, steel-plastic
Color: Customized
Application: To protect the thread and connection of casing, tubing, drill pipe during transportation and loading and unloading
| API Spec 5B (Plug Gauge & Ring Gauge) | ||||
| Normal Size | Thread | |||
| Applications | From | To | TPI | TPF |
| Casing – Round | 4 1/2 | 13 3/8 | 8 | 3/4 |
| Line Pipe | 1/8 | 13 3/8 | 8-27 | 3/4 |
| Tubing – Non Upset | 1.050 | 3 1/2 | 10 | 3/4 |
| 4 | 4 1/2 | 8 | 3/4 | |
| Tubing – External Upset | 1.050 | 1.900 | 10 | 3/4 |
| 2 3/8 | 4 1/2 | 8 | 3/4 | |
| Tubing – Integral Joint | 2 3/8 | 4 1/2 | 10 | 3/4 |
| Extreme Line Casing | 5 | 7 5/8 | 6 | 1 1/2 |
| 8 5/8 | 10 3/4 | 8 | 1 1/4 | |
| API Spec 7-2 (Plug Gauge & Ring Gauge) | ||||
| Normal Size | Thread | |||
| Applications | From | To | TPI | TPF |
| NC Connections | NC 10 | NC 16 | 6 | 1 1/2 |
| NC 23 | NC 50 | 4 | 2 | |
| NC 56 | NC 77 | 4 | 3 | |
| REG (Regular Rotary Shoulder Connections) | 1 | 8 5/8 | 14-6 | 1 1/2, 2, 3 |
| FH (Full Hole) | 3 1/2 | 6 5/8 | 4-5 | 2, 3 |
| IF (Internal Flush) | 2 3/8 | 5 1/2 | 2 | 2 |
| API Spec 11B | |||
| Normal Size | Thread | ||
| Applications | From | To | TPI |
| Sucker Rods P2-P8 & B2-B6 | 1/2 | 1 1/8 | 10 |
| Sucker Rods P1-P8 & B1-B6 | 1/2 | 1 1/8 | 10 |
API Thread Gauges are used for gaging API internal & external threads, manufactured according to API 5B, API 7-2 & API 11B standard, including working gages and master gages.
Send Us Enquiry
Buyer’s Guide
Please send us your inquiry with detail item description or with Model number. If there is no packing demand we take it as our regular exported standard packing. We will offer you an order form for filling. We will recommend you the most suitable model according to information you offered.

We can give you really high quality products with competitive price. We have a better understanding in Chinese market, with us your money will be safe.
Get Quick Response
What our clients say
Testimonials from satisfied clients who love our products and services at Manufacturing Company.
