ASME B18.22.1 Type A

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Adfast Components offers precision-engineered hot and cold forged fasteners ranging from M3 to M100, ensuring superior strength and reliability. Designed to meet diverse industrial standards, our components guarantee durability and performance.

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Explore Adfast Components for precision-engineered fasteners, offering hot & cold forged solutions with metric sizes from M3 to M100 for diverse industrial needs.

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Home
About
Product
Product

Adfast Components offers precision-engineered hot and cold forged fasteners ranging from M3 to M100, ensuring superior strength and reliability. Designed to meet diverse industrial standards, our components guarantee durability and performance.

Precision Components

Pumps & Valves

Automobile

Customised

Electronic

Medical

Contract Manufacturing

3D Printing & Additive Manufacturing

Fastener

Bolts

Coated Fasteners

Washer

Stud Bolts

Nuts

Screws
Resources
Resources

Explore Adfast Components for precision-engineered fasteners, offering hot & cold forged solutions with metric sizes from M3 to M100 for diverse industrial needs.

materials

Carbon Steel

Alloy Steel

Stainless Steel

Super Alloys

Non Ferrous Metal & Alloys

High Performance Nickel Alloys

Copper Alloys

Technical

Specification

Standard

Weight

Applications

Threads
Contact

Dimensions of Type A Flat Washers

Nominal Sizes		Pattern	A			B			C
			Basic	Tolerance		Basic	Tolerance		Basic	Max	Min
			Basic	Plus	Minus	Basic	Plus	Minus	Basic	Max	Min
–	–	–	0.078	0.000	0.005	0.188	0.000	0.005	0.020	0.025	0.016
–	–	–	0.094	0.000	0.005	0.250	0.000	0.005	0.020	0.025	0.016
–	–	–	0.125	0.008	0.005	0.312	0.006	0.005	0.032	0.040	0.025
6	0.138	–	0.156	0.008	0.005	0.375	0.008	0.005	0.049	0.065	0.036
8	0.164	–	0.188	0.008	0.005	0.438	0.015	0.005	0.049	0.065	0.036
10	0.190	–	0.219	0.008	0.005	0.500	0.015	0.005	0.049	0.065	0.036
3/16	0.188	–	0.250	0.015	0.005	0.562	0.015	0.005	0.049	0.065	0.036
12	0.216	–	0.250	0.015	0.005	0.562	0.015	0.005	0.065	0.080	0.051
1/4	0.250	N	0.281	0.015	0.005	0.625	0.015	0.005	0.065	0.080	0.051
1/4	0.250	W	0.312	0.015	0.005	0.734	0.015	0.007	0.065	0.080	0.051
5/16	0.312	N	0.344	0.015	0.005	0.688	0.015	0.007	0.065	0.080	0.051
5/16	0.312	W	0.375	0.015	0.005	0.875	0.015	0.007	0.083	0.104	0.064
3/8	0.375	N	0.406	0.015	0.005	0.812	0.030	0.007	0.065	0.080	0.051
3/8	0.375	W	0.438	0.015	0.005	1.000	0.015	0.007	0.083	0.104	0.064
7/16	0.438	N	0.469	0.015	0.005	0.922	0.030	0.007	0.065	0.080	0.051
7/16	0.438	W	0.500	0.015	0.005	1.250	0.030	0.007	0.083	0.104	0.064
1/2	0.500	N	0.531	0.015	0.005	1.062	0.030	0.007	0.095	0.121	0.074
1/2	0.500	W	0.562	0.015	0.005	1.375	0.030	0.007	0.109	0.132	0.086
9/16	0.562	N	0.594	0.015	0.005	1.158	0.030	0.007	0.095	0.121	0.074
9/16	0.562	W	0.625	0.015	0.005	1.469	0.030	0.007	0.109	0.132	0.086
5/8	0.625	N	0.656	0.030	0.007	1.312	0.030	0.007	0.095	0.121	0.074
5/8	0.625	W	0.688	0.030	0.007	1.750	0.030	0.007	0.134	0.160	0.108
3/4	0.750	N	0.812	0.030	0.007	1.469	0.030	0.007	0.134	0.160	0.108
3/4	0.750	W	0.812	0.030	0.007	2.000	0.030	0.007	0.148	0.177	0.122
7/8	0.875	N	0.938	0.030	0.007	1.750	0.030	0.007	0.134	0.160	0.108
7/8	0.875	W	0.938	0.030	0.007	2.250	0.030	0.007	0.165	0.192	0.136
1	1.000	N	1.062	0.030	0.007	2.000	0.030	0.007	0.134	0.160	0.108
1	1.000	W	1.062	0.030	0.007	2.500	0.030	0.007	0.165	0.192	0.136
1-1/8	1.125	N	1.250	0.030	0.007	2.250	0.030	0.007	0.134	0.160	0.108
1-1/8	1.125	W	1.250	0.030	0.007	2.750	0.030	0.007	0.165	0.192	0.136
1-1/4	1.250	N	1.375	0.030	0.007	2.500	0.030	0.007	0.165	0.192	0.136
1-1/4	1.250	W	1.375	0.030	0.007	3.000	0.030	0.007	0.165	0.192	0.136
1-3/8	1.375	N	1.500	0.030	0.007	2.750	0.030	0.007	0.165	0.192	0.136
1-3/8	1.375	W	1.500	0.045	0.010	3.250	0.045	0.010	0.180	0.213	0.153
1-1/2	1.500	N	1.625	0.030	0.007	3.000	0.030	0.007	0.165	0.192	0.136
1-1/2	1.500	W	1.625	0.045	0.010	3.500	0.045	0.010	0.180	0.213	0.153
1-5/8	1.625		1.750	0.045	0.010	3.750	0.045	0.010	0.180	0.213	0.153
1-3/4	1.750		1.875	0.045	0.010	4.000	0.045	0.010	0.180	0.213	0.153
1-7/8	1.875		2.000	0.045	0.010	4.250	0.045	0.010	0.180	0.213	0.153
2	2.000		2.125	0.045	0.010	4.500	0.045	0.010	0.180	0.213	0.153
2-1/4	2.250		2.375	0.045	0.010	4.750	0.045	0.010	0.220	0.248	0.193
2-1/2	2.500		2.625	0.045	0.010	5.000	0.045	0.010	0.238	0.280	0.210
2-3/4	2.750		2.875	0.065	0.010	5.250	0.065	0.010	0.259	0.310	0.228
3	3.000		3.125	0.065	0.010	5.500	0.065	0.010	0.284	0.327	0.249

Notes : Dimensions are in inches.

Preferred sizes are for the most part from series previously designated ‘Standard Plate’ and ‘SAE’. Where common sizes existed in the two series, the SAE size is designated ‘N’ (narrow) and the Standard Plate ‘W’ (wide). These sizes as well as all other sizes of Type A Plain Washers are to be ordered by ID, OD and thickness dimensions.
Nominal washer sizes are intended for use with comparable nominal screws or bolt sizes.
The 0.734 in., 1.156 in. and 1.469 in. outside diameters avoid washers which could be used in coin operated devices.

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ASME B18.22.1 Type A

Dimensions of Type A Flat Washers

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