Thread Gauge

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.

API working thread gauges include plug gauge and ring gauge. All of our working gauges will be inspected by master gauges after production and corresponding Calibration Certificate will be provided together with thread gauges or separately couriered as clients' request.

Our thread gauges are mostly used to inspect thread of tubing, casing, drill pipe, drill collar, line pipe, sucker rod & polished rod, etc.

The thread type includes: EUE/UPTBG, NUE/TBG, BTC/BCSG, STC/CSG, LTC/LCSG, REG, IF, FH, NC, LP, NPT, etc.

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
Tubing - Non Upset	4	4 1/2	8	3/4
Tubing - External Upset	1.050	1.900	10	3/4
Tubing - External Upset	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
Extreme Line Casing	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