The American Petroleum Institute (API) Specification 5B stands as the definitive international standard for threading, gauging, and thread inspection of casing, tubing, and line pipe threads used in oil and gas operations. First established in response to the industry’s critical need for reliable threaded connections that can withstand extreme downhole conditions.

China Made Solid BPV thread Ring gages per API 6A/API 5A
2”-4 HBPV LH Thread Ring Gage，3”-4 HBPV LH Thread Ring Gage，4”-4 HBPV LH Thread Ring Gage，5”-4 HBPV LH Thread Ring Gage，6 1/2”-2 HBPV LH Thread Ring Gage，
2 1/2”-4 HBPV LH Thread Plug Gage，3 1/2”-4 HBPV LH Thread Plug Gage，4 1/2”-4 HBPV LH Thread Plug Gage，5 1/2”-4 HBPV LH Thread Plug Gage，6 5/16”-2 HBPV LH Thread Plug Gage，

13 3/8-5 BCSG,Buttress Casing (BCSG) thread gauge with a nominal size of 13 3/8 inches and a pitch of 5 threads per inch (TPI),BUTTRESS CASING (BCSG)-API gages,

2 1/2-4 HBPV LH Thread Ring Gauge, API BPV Thread ring gage 2 1/2-4 HBPV LH made in China

4 1/2 CSG Thread Plug Gage PER API 5B made In China , delivery time:in stock

7" BCSG Thread Ring Gage made In China per API 5B

3“-4 HBPV LH Thread Ring gage made in China/4“-4 HBPV LH Thread Ring Gage Chinese/5“-4 HBPV LH Thread Ring & Plug

1.900 Sharp Vee plug and Ring, 2.375 Sharp Vee plug and Ring,2.875 Sharp Vee plug and Ring,2"Sharp Vee plug and Ring made in China.

Sowant Precision Gage can offer you the best 2 7/8 UPTBG Thread Ring and 2 7/8 UPTBG Thread Pug gage in China in reasonable price.

Sowant Precision Gage can offer you 7 5/8 LCSG Working Plug and 7 5/8 LCSG Working ring gages which made both in China.

SOWANT precision gage is the best global manufacturer, supplier, rental and calibration of API thread gauges/gages and precision measuring tools.

Sowant is a  supplier in China of 7 5/8 REG API thread gauge , 7-5/8″ Regular Rotary Shouldered Connection (REG) Work Plug Gauge