ASME B18.21.1 dimensions — Type A plain washers, inch series (Table 11 profile)

2009 (R2016) edition, current · 35 sizes, #0 – 1-1/2 W see the cross-reference →

We supply to ASME B18.21.1. Name it on your order.

ASME B18.21.1 dimensions

Thread size	Washer Series	d1Inner Diameter (in)	d1 +Inner Diameter Plus Tolerance (in)	d1 −Inner Diameter Minus Tolerance (in)	d2Outer Diameter (in)	d2 +Outer Diameter Plus Tolerance (in)	d2 −Outer Diameter Minus Tolerance (in)	hWasher Thickness (in)	hThickness (max) (in)	hThickness (min) (in)
#0	Preferred	0.078	0	0.005	0.188	0	0.005	0.02	0.025	0.016
#2	Preferred	0.094	0	0.005	0.25	0	0.005	0.02	0.025	0.016
#4	Preferred	0.125	0.008	0.005	0.312	0.008	0.005	0.032	0.04	0.025
#6	Preferred	0.156	0.008	0.005	0.375	0.015	0.005	0.049	0.065	0.036
#8	Preferred	0.188	0.008	0.005	0.438	0.015	0.005	0.049	0.065	0.036
#10	Preferred	0.219	0.008	0.005	0.5	0.015	0.005	0.049	0.065	0.036
#12	Preferred	0.25	0.015	0.005	0.562	0.015	0.005	0.065	0.08	0.051
1/4 N	N	0.281	0.015	0.005	0.625	0.015	0.005	0.065	0.08	0.051
1/4 W	W	0.312	0.015	0.005	0.734	0.015	0.007	0.065	0.08	0.051
5/16 N	N	0.344	0.015	0.005	0.688	0.015	0.007	0.065	0.08	0.051
5/16 W	W	0.375	0.015	0.005	0.875	0.03	0.007	0.083	0.104	0.064
3/8 N	N	0.406	0.015	0.005	0.812	0.015	0.007	0.065	0.08	0.051
3/8 W	W	0.438	0.015	0.005	1	0.03	0.007	0.083	0.104	0.064
7/16 N	N	0.469	0.015	0.005	0.922	0.015	0.007	0.065	0.08	0.051
7/16 W	W	0.5	0.015	0.005	1.25	0.03	0.007	0.083	0.104	0.064
1/2 N	N	0.531	0.015	0.005	1.062	0.03	0.007	0.095	0.121	0.074
1/2 W	W	0.562	0.015	0.005	1.375	0.03	0.007	0.109	0.132	0.086
9/16 N	N	0.594	0.015	0.005	1.156	0.03	0.007	0.095	0.121	0.074
9/16 W	W	0.625	0.015	0.005	1.469	0.03	0.007	0.109	0.132	0.086
5/8 N	N	0.656	0.03	0.007	1.312	0.03	0.007	0.095	0.121	0.074
5/8 W	W	0.688	0.03	0.007	1.75	0.03	0.007	0.134	0.16	0.108
3/4 N	N	0.812	0.03	0.007	1.469	0.03	0.007	0.134	0.16	0.108
3/4 W	W	0.812	0.03	0.007	2	0.03	0.007	0.148	0.177	0.122
7/8 N	N	0.938	0.03	0.007	1.75	0.03	0.007	0.134	0.16	0.108
7/8 W	W	0.938	0.03	0.007	2.25	0.03	0.007	0.165	0.192	0.136
1 N	N	1.062	0.03	0.007	2	0.03	0.007	0.134	0.16	0.108
1 W	W	1.062	0.03	0.007	2.5	0.03	0.007	0.165	0.192	0.136
1-1/8 N	N	1.25	0.03	0.007	2.25	0.03	0.007	0.134	0.16	0.108
1-1/8 W	W	1.25	0.03	0.007	2.75	0.03	0.007	0.165	0.192	0.136
1-1/4 N	N	1.375	0.03	0.007	2.5	0.03	0.007	0.165	0.192	0.136
1-1/4 W	W	1.375	0.03	0.007	3	0.03	0.007	0.165	0.192	0.136
1-3/8 N	N	1.5	0.03	0.007	2.75	0.03	0.007	0.165	0.192	0.136
1-3/8 W	W	1.5	0.045	0.01	3.25	0.045	0.01	0.18	0.213	0.153
1-1/2 N	N	1.625	0.03	0.007	3	0.03	0.007	0.165	0.192	0.136
1-1/2 W	W	1.625	0.045	0.01	3.5	0.045	0.01	0.18	0.213	0.153

35 of 35 sizes shown.

ASME B18.21.1 sizes

18 diameters · weight and hole sizes live on each size page

1/4 N 1/4 W 5/16 N 5/16 W 3/8 N 3/8 W 7/16 N 7/16 W 1/2 N 1/2 W 5/8 N 5/8 W 3/4 N 3/4 W 7/8 N 7/8 W 1 N 1 W All 18 sizes in this family →

What we supply to ASME B18.21.1

1 materials

Material	Property class	Finish
Carbon Steel	—	Zinc Plated · Hot Dip Galvanized · Plain

Equivalents and mating parts

ASTM F436 →Type A plain washers — inch series (Table 11 profile) sizes and weights →

To ASME B18.21.1Plain Steel Washer ASTM F844

Quote against ASME B18.21.1

Standard, size, material, finish, quantity and destination are enough to begin.

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