Unified Thread Plug Gage Size from 2 1/8-12UN to 3 1/2-4UNC,FYOU PMEC Leading Solutions

Unified Thread Plug Gage Size from 2 1/8-12UN to 3 1/2-4UNC

UNS thread gauge is Unified Special Pitch thread gauge; UNEF thread gauges is Unified National Extra Fine thread gauge; UNF thread gauge is UNIFIED NATIONAL FINE thread gage; UNC thread gage is Unified National Coarse thread gage with 60 degree thread angle; UN thread gauge is Unified Constant Pitch thread gauge.
Application of Unified Thread Working Plug Gauge: Comprehensive inspection of unified internal threads specified in ANSI B1.1-1982 and FED-STD-H28, H28/3 (1978)
ANSI unified thread working plug gauge inspection environment: standard temperature 20°C ± 1°C, standard condition measurement force is zero.
Unified Thread Working Plug Gauge Inspection Method: The length measuring instrument uses the “three-needle method” to detect a single mean diameter. The universal tool microscope can detect pitch, half angle, minor diameter, and clearance groove.

Unified Thread Plug Gage Size from 2 1/8-12UN to 3 1/2-4UNC

Size	T.P.I	Pitch	Class	Go/No Go	Major d	Pitch Diameter d 2	Minor Diameter d 1	Thread Length L 2	ToTal length L
2 1/8-12UN	12	2.12	2B	GO	53.99	52.621	51.379	26	180
				NO GO	53.718	52.802	51.379	16
2 1/8-16UN	16	1.59	2B	GO	53.99	52.964	52.027	18	172
				NO GO	53.81	53.122	52.027	16
2 1/4-4.5UNC	4.5	5.64	2B	GO	57.17	53.51	50.226	55	216
				NO GO	56.248	53.805	50.226	35
2 1/4-12UN	12	2.12	2B	GO	57.165	55.796	54.554	26	180
				NO GO	56.893	55.977	54.554	16
2 1/4-16UN	16	1.59	2B	GO	57.165	56.139	55.202	18	172
				NO GO	56.985	56.297	55.202	16
2 3/8-12UN	12	2.12	2B	GO	60.34	58.971	57.729	26	180
				NO GO	60.074	59.157	57.729	16
2 3/8-16UN	16	1.59	2B	GO	60.34	59.314	58.377	18	172
				NO GO	60.165	59.477	58.377	16
2 1/2-4UNC	4	6.35	2B	GO	63.523	59.4	55.71	55	230
				NO GO	62.469	59.718	55.71	35
2 1/2-12UN	12	2.12	2B	GO	63.515	62.146	60.904	26	182
				NO GO	63.249	62.332	60.904	16
2 1/2-16UN	16	1.59	2B	GO	63.515	62.489	61.552	18	174
				NO GO	63.34	62.652	61.552	16
2 5/8-12UN	12	2.12	2B	GO	66.69	65.321	64.079	26	182
				NO GO	66.424	65.507	64.079	16
2 5/8-16UN	16	1.59	2B	GO	66.69	65.664	64.727	18	174
				NO GO	66.515	65.827	64.727	16
2 3/4-4UNC	4	6.35	2B	GO	69.873	65.75	62.06	55	230
				NO GO	68.824	66.073	62.06	35
2 3/4-12UN	12	2.12	2B	GO	69.865	68.496	67.254	26	182
				NO GO	69.599	68.682	67.254	16
2 3/4-16UN	16	1.59	2B	GO	69.865	68.839	67.902	18	174
				NO GO	69.69	69.002	67.902	16
2 7/8-12UN	12	2.12	2B	GO	73.04	71.671	70.429	26	182
				NO GO	72.776	71.859	70.429	16
2 7/8-16UN	16	1.59	2B	GO	73.04	72.014	71.077	18	174
				NO GO	72.868	72.179	71.077	16
3-4UNC	4	6.35	2B	GO	76.223	72.1	68.41	55	230
				NO GO	75.179	72.428	68.41	35
3-12UN	12	2.12	2B	GO	76.215	74.846	73.604	26	182
				NO GO	75.951	75.034	73.604	16
3-16UN	16	1.59	2B	GO	76.215	75.189	74.252	18	174
				NO GO	76.043	75.354	74.252	16
3 1/8-12UN	12	2.12	2B	GO	79.39	78.021	76.779	26	182
				NO GO	79.126	78.209	76.779	16
3 1/8-16UN	16	1.59	2B	GO	79.39	78.364	77.427	18	174
				NO GO	79.218	78.529	77.427	16
3 1/4-4UNC	4	6.35	2B	GO	82.573	78.45	74.76	55	230
				NO GO	81.534	78.783	74.76	35
3 1/4-12UN	12	2.12	2B	GO	82.565	81.196	79.954	26	182
				NO GO	82.301	81.384	79.954	16
3 1/4-16UN	16	1.59	2B	GO	82.565	81.539	80.602	18	174
				NO GO	82.393	81.704	80.602	16
3 3/8-12UN	12	2.12	2B	GO	85.74	84.371	83.129	26	182
				NO GO	85.481	84.564	83.129	16
3 3/8-16UN	16	1.59	2B	GO	85.74	84.714	83.777	18	174
				NO GO	85.573	84.884	83.777	16
3 1/2-4UNC	4	6.35	2B	GO	88.923	84.8	81.11	55	230
				NO GO	87.889	85.138	81.11	35

How to order?
Please specify the item size diameter, teeth per inch, accuracy class in your order. We can provide ring gauges in class 1A,2A,3A and plug gauges in class 1B,2B and 3B.

For Example： Ring gauge 2 1/4－12UN-2A GO/NO GO
Plug gauge 2 1/4－12UN-2B GO/NO GO
And E-mail to: sales@fyougauges.com

Super Size thread Gages is available, till to Max Size: 1000 mm ,come with long form calibration certificate.