API SPEC 7-2 REGULAR ROTARY WORKING/MASTER/TAPER GAGES
SIZE	T.P.I	T.P.F	THD FORM	TAPER	ANGLE
2-3/8 REG	5	3	V-0.040	1:4	60°
2-7/8 REG	5	3	V-0.040	1:4
3-1/2 REG	5	3	V-0.040	1:4
4-1/2 REG	5	3	V-0.040	1:4
5-1/2 REG	4	3	V-0.050	1:4
6-5/8 REG	4	2	V-0.050	1:6
7-5/8 REG	4	3	V-0.050	1:4
8-5/8 REG	4	3	V-0.050	1:4

Instructions:
1）Implementation of standards：API SPEC 7-2：2017
2）Material: GCr15， Measuring surface hardness 60-63HRC;
3）Come with the calibration certificates ,which can be tracealbe to NIM.
How to order?
For example:
Pls mark : Working Gauges: 2 3/8 REG RING & PLUG, or  2 3/8 REG BOX&PIN,
and E-mail to: edwin@szfyou.com