1, Applied specification: API Spec 5B;
2, Material: bearing steel that is hardened to Rockwell C60-63;
3, Guaranteed quality: We have been manufacturing API gauges since 1970s. Our gauges have been field-tested by over 800 customers in 35 countries;
4, 3rd-party calibration: All our working gauges are calibrated and certified with certified API reference master gauges by a national-level 3rd-party calibration center which is accredited to ISO/IEC 17025:2005.
When ordering, please specify the following information:
1, Types & sizes of connections;
2, Master gauges or working gauges;
3, Ring or plug, or set;
4, Right hand or left hand.
CASING SHORT-THREAD (CSG) | ||||
---|---|---|---|---|
SIZE | T.P.I. | T.P.F. | PITCH DIAMETER | STANDOFF TOLERANCE |
4-1/2 | 8 | 1:16 | 111.846 | 9.525±0.635 |
5 | 124.546 | |||
5-1/2 | 137.246 | |||
6-5/8 | 165.821 | |||
7 | 175.346 | |||
7-5/8 | 191.114 | |||
8-5/8 | 216.514 | |||
9-5/8 | 241.914 | |||
10-3/4 | 270.489 | |||
11-3/4 | 295.889 | |||
13-3/8 | 337.164 | |||
16 | 403.839 | |||
18-5/8 | 470.514 | |||
20 | 505.439 |