Our main products and services are as follows:

API thread gauges-Regular Rotary(REG)

Size	Thread Form	T. P. I.	T. P. F.	Pitch Diameter	Standoff Tolerance
REG 2-3/8	V-0.040	5	1:4	60.080	15.875±0.100
REG 2-7/8				69.605
REG 3-1/2				82.293
REG 4-1/2				110.868
REG 5-1/2	V-0.050	4		132.944
REG 6-5/8			1:6	146.248
REG 7-5/8			1:4	170.549
REG 8-5/8				194.731

 
API thread gages-Internal Flush(IF)

API gages-Full Hole(FH)

Size	Thread Form	T. P. I.	T. P. F.	Pitch Diameter	Standoff Tolerance
FH 3-1/2	V-0.040	5	1:4	94.844	15.875±0.100
FH 4(NC40)	V-0.065	4	1:6	103.429
FH 4-1/2	V-0.040	5	1:4	115.113
FH 5-1/2	V-0.050	4	1:6	142.011
FH 6-5/8	V-0.050	4	1:6	165.598

 
API gauges-Numbered Connections(NC)

Size	Thread Form	T. P. I.	T. P. F.	Pitch Diameter	Standoff Tolerance
IF 2-3/8(NC26)	V-0.065	4	1:6	67.767	15.875±0.100
IF 2-7/8(NC31)				80.848
IF 3-1/2(NC38)				96.723
IF 4(NC46)				117.500
IF 4-1/2(NC50)				128.059
IF 5-1/2				157.201

 
Gauges Calibration