Unified Thread Ring Gage Size from 3 1/2-12 UN to 5-16 UN,FYOU PMEC Leading Solutions

Unified Thread Ring Gage Size from 3 1/2-12 UN to 5-16 UN

All our Unified thread ring gages and plug gages are manufactured compliance to standard: ASME B1.2-1983 ASME B1.3-2007
Material：Gcr15, The measuring surface hardness is 53-60HRC, and the hardness of ≤NO#4 is 53-60HRC.
All gages are brand new;
The standard recommends common fits 2A/2B; if no special note, ring gage 2A, plug gage 2B will be choose. Internal thread tolerance class: 1B、2B、3B;External thread tolerance class: 1A、2A、3A;3A 3B will be used when closer tolerance required.

Unified Thread Ring Gage Size from 3 1/2-12 UN to 5-16 UN

Size	T.P.I	Pitch	Class	Go/No Go	Major d	Pitch Dia.d 2	Minor d 1
3 1/2-12UN	12	2.12	2A	GO	88.852	87.457	86.545
3 1/2-12UN	12	2.12	2A	NO GO	88.852	87.31	86.858
3 1/2-16UN	16	1.59	2A	GO	88.857	87.805	87.122
3 1/2-16UN	16	1.59	2A	NO GO	88.857	87.673	87.335
3 5/8-12UN	12	2.12	2A	GO	92.024	90.63	89.718
3 5/8-12UN	12	2.12	2A	NO GO	92.024	90.48	90.028
3 5/8-16UN	16	1.59	2A	GO	92.029	90.978	90.294
3 5/8-16UN	16	1.59	2A	NO GO	92.029	90.843	90.505
3 3/4-4UNC	4	6.35	2A	GO	95.164	91.013	88.265
3 3/4-4UNC	4	6.35	2A	NO GO	95.164	90.748	89.38
3 3/4-12UN	12	2.12	2A	GO	95.199	93.805	92.893
3 3/4-12UN	12	2.12	2A	NO GO	95.199	93.655	93.203
3 3/4-16UN	16	1.59	2A	GO	95.204	94.153	93.469
3 3/4-16UN	16	1.59	2A	NO GO	95.204	94.018	93.68
3 7/8-12UN	12	2.12	2A	GO	98.374	96.98	96.068
3 7/8-12UN	12	2.12	2A	NO GO	98.374	96.83	96.378
3 7/8-16UN	16	1.59	2A	GO	98.379	97.328	96.644
3 7/8-16UN	16	1.59	2A	NO GO	98.379	97.193	96.855
4-4UNC	4	6.35	2A	GO	101.514	97.363	94.615
4-4UNC	4	6.35	2A	NO GO	101.514	97.095	95.728
4-12UN	12	2.12	2A	GO	101.549	100.155	99.243
4-12UN	12	2.12	2A	NO GO	101.549	100.005	99.553
4-16UN	16	1.59	2A	GO	101.554	100.503	99.819
4-16UN	16	1.59	2A	NO GO	101.554	100.368	100.03
4 1/8-12UN	12	2.12	2A	GO	104.724	103.32	102.41
4 1/8-12UN	12	2.12	2A	NO GO	104.724	103.177	102.728
4 1/8-16UN	16	1.59	2A	GO	104.729	103.668	102.987
4 1/8-16UN	16	1.59	2A	NO GO	104.729	103.541	103.205
4 1/4-12UN	12	2.12	2A	GO	107.899	106.495	105.585
4 1/4-12UN	12	2.12	2A	NO GO	107.899	106.352	105.903
4 1/4-16UN	16	1.59	2A	GO	107.904	106.843	106.162
4 1/4-16UN	16	1.59	2A	NO GO	107.904	106.716	106.38
4 3/8-12UN	12	2.12	2A	GO	111.074	109.67	108.76
4 3/8-12UN	12	2.12	2A	NO GO	111.074	109.527	109.078
4 3/8-16UN	16	1.59	2A	GO	111.079	110.018	109.337
4 3/8-16UN	16	1.59	2A	NO GO	111.079	109.891	109.555
4 1/2-12UN	12	2.12	2A	GO	114.249	112.845	111.935
4 1/2-12UN	12	2.12	2A	NO GO	114.249	112.702	112.253
4 1/2-16UN	16	1.59	2A	GO	114.254	113.193	112.512
4 1/2-16UN	16	1.59	2A	NO GO	114.254	113.066	112.73
4 5/8-12UN	12	2.12	2A	GO	117.424	116.02	115.11
4 5/8-12UN	12	2.12	2A	NO GO	117.424	115.872	115.423
4 5/8-16UN	16	1.59	2A	GO	117.429	116.368	115.687
4 5/8-16UN	16	1.59	2A	NO GO	117.429	116.235	115.9
4 3/4-12UN	12	2.12	2A	GO	120.599	119.195	118.285
4 3/4-12UN	12	2.12	2A	NO GO	120.599	119.047	118.598
4 3/4-16UN	16	1.59	2A	GO	120.604	119.543	118.862
4 3/4-16UN	16	1.59	2A	NO GO	120.604	119.41	119.075
4 7/8-12UN	12	2.12	2A	GO	123.774	122.37	121.46
4 7/8-12UN	12	2.12	2A	NO GO	123.774	122.222	121.773
4 7/8-16UN	16	1.59	2A	GO	123.779	122.718	122.037
4 7/8-16UN	16	1.59	2A	NO GO	123.779	122.585	122.25
5-12UN	12	2.12	2A	GO	126.949	125.545	124.635
5-12UN	12	2.12	2A	NO GO	126.949	125.397	124.948
5-16UN	16	1.59	2A	GO	126.954	125.893	125.212
5-16UN	16	1.59	2A	NO GO	126.954	125.76	125.425

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.