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

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

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 2 1/8-12UN to 3 1/2-4UNC

Size	T.P.I	Pitch	Class	Go/No Go	Major d	Pitch Dia.d 2	Minor d 1
2 1/8-12UN	12	2.12	2A	GO	53.929	52.535	51.623
2 1/8-12UN	12	2.12	2A	NO GO	53.929	52.395	51.943
2 1/8-16UN	16	1.59	2A	GO	53.934	52.883	52.2
2 1/8-16UN	16	1.59	2A	NO GO	53.934	52.761	52.423
2 1/4-4.5UNC	4.5	5.64	2A	GO	57.076	53.386	50.947
2 1/4-4.5UNC	4.5	5.64	2A	NO GO	57.076	53.158	51.943
2 1/4-12UN	12	2.12	2A	GO	57.104	55.71	54.798
2 1/4-12UN	12	2.12	2A	NO GO	57.104	55.57	55.118
2 1/4-16UN	16	1.59	2A	GO	57.109	56.058	55.375
2 1/4-16UN	16	1.59	2A	NO GO	57.109	55.936	55.598
2 3/8-12UN	12	2.12	2A	GO	60.277	58.882	57.97
2 3/8-12UN	12	2.12	2A	NO GO	60.277	58.74	58.288
2 3/8-16UN	16	1.59	2A	GO	60.282	59.23	58.547
2 3/8-16UN	16	1.59	2A	NO GO	60.282	59.106	58.768
2 1/2-4UNC	4	6.35	2A	GO	63.421	59.271	56.523
2 1/2-4UNC	4	6.35	2A	NO GO	63.421	59.026	57.658
2 1/2-12UN	12	2.12	2A	GO	63.452	62.057	61.145
2 1/2-12UN	12	2.12	2A	NO GO	63.452	61.915	61.463
2 1/2-16UN	16	1.59	2A	GO	63.457	62.405	61.722
2 1/2-16UN	16	1.59	2A	NO GO	63.457	62.281	61.943
2 5/8-12UN	12	2.12	2A	GO	66.627	65.232	64.32
2 5/8-12UN	12	2.12	2A	NO GO	66.627	65.09	64.638
2 5/8-16UN	16	1.59	2A	GO	66.632	65.58	64.897
2 5/8-16UN	16	1.59	2A	NO GO	66.632	65.456	65.118
2 3/4-4UNC	4	6.35	2A	GO	69.769	65.618	62.87
2 3/4-4UNC	4	6.35	2A	NO GO	69.769	65.371	64.003
2 3/4-12UN	12	2.12	2A	GO	69.802	68.407	67.495
2 3/4-12UN	12	2.12	2A	NO GO	69.802	68.265	67.813
2 3/4-16UN	16	1.59	2A	GO	69.807	68.755	68.072
2 3/4-16UN	16	1.59	2A	NO GO	69.807	68.631	68.293
2 7/8-12UN	12	2.12	2A	GO	72.977	71.582	70.67
2 7/8-12UN	12	2.12	2A	NO GO	72.977	71.438	70.985
2 7/8-16UN	16	1.59	2A	GO	72.982	71.93	71.247
2 7/8-16UN	16	1.59	2A	NO GO	72.982	71.803	71.465
3-4UNC	4	6.35	2A	GO	76.119	71.968	69.22
3-4UNC	4	6.35	2A	NO GO	76.119	71.716	70.348
3-12UN	12	2.12	2A	GO	76.152	74.757	73.845
3-12UN	12	2.12	2A	NO GO	76.152	74.613	74.16
3-16UN	16	1.59	2A	GO	76.157	75.105	74.422
3-16UN	16	1.59	2A	NO GO	76.157	74.978	74.64
3 1/8-12UN	12	2.12	2A	GO	79.327	77.932	77.02
3 1/8-12UN	12	2.12	2A	NO GO	79.327	77.788	77.335
3 1/8-16UN	16	1.59	2A	GO	79.332	78.28	77.597
3 1/8-16UN	16	1.59	2A	NO GO	79.332	78.153	77.815
3 1/4-4UNC	4	6.35	2A	GO	82.466	78.316	75.568
3 1/4-4UNC	4	6.35	2A	NO GO	82.466	78.058	76.69
3 1/4-12UN	12	2.12	2A	GO	82.502	81.107	80.195
3 1/4-12UN	12	2.12	2A	NO GO	82.502	80.963	80.51
3 1/4-16UN	16	1.59	2A	GO	82.507	81.455	80.772
3 1/4-16UN	16	1.59	2A	NO GO	82.507	81.328	80.99
3 3/8-12UN	12	2.12	2A	GO	85.677	84.282	83.37
3 3/8-12UN	12	2.12	2A	NO GO	85.677	84.135	83.683
3 3/8-16UN	16	1.59	2A	GO	85.682	84.63	83.947
3 3/8-16UN	16	1.59	2A	NO GO	85.682	84.498	84.16
3 1/2-4UNC	4	6.35	2A	GO	88.816	84.666	81.918
3 1/2-4UNC	4	6.35	2A	NO GO	88.816	84.405	83.038

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.