Uss Washers

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About Washers

USS washers generally have a larger ID and OD than SAE washers.

316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.

18-8 stainless steel washers have good chemical resistance and may be mildly magnetic. Black-oxide washers have a matte-black finish.

Zinc-plated steel washers are corrosion resistant in wet environments.

Hot-dipped galvanized steel washers are 10 times as corrosion resistant as zinc-plated washers.

Black ultra-corrosion-resistant coated steel washers resist chemicals and withstand 1,000 hours of salt spray.

For technical drawings and 3-D models, click on a part number.

316 Stainless Steel
For Screw Size	ID	OD	Thick.	Hardness	Specifications Met	Pkg. Qty.		Pkg.
1/4"	0.312"	0.750"	0.051"-0.080"	Rockwell B68	USS Standards	50	000000000	000000
5/16"	0.375"	0.875"	0.064"-0.104"	Rockwell B68	USS Standards; ASME B18.21.1	25	000000000	00000
3/8"	0.438"	1.000"	0.064"-0.104"	Rockwell B68	USS Standards; ASME B18.21.1	10	000000000	0000
7/16"	0.500"	1.250"	0.064"-0.104"	Rockwell B68	USS Standards; ASME B18.21.1	10	000000000	00000
1/2"	0.562"	1.375"	0.086"-0.132"	Rockwell B68	USS Standards; ASME B18.21.1	5	000000000	00000
9/16"	0.625"	1.500"	0.086"-0.132"	Rockwell B68	USS Standards	5	000000000	00000
5/8"	0.688"	1.750"	0.108"-0.160"	Rockwell B68	USS Standards; ASME B18.21.1	5	000000000	00000
3/4"	0.812"	2.000"	0.122"-0.177"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
7/8"	0.938"	2.250"	0.136"-0.192"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	0000
1"	1.062"	2.500"	0.136"-0.192"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
1 1/8"	1.250"	2.750"	0.136"-0.192"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
1 1/4"	1.375"	3.000"	0.136"-0.192"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
1 3/8"	1.500"	3.250"	0.153"-0.213"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	00000
1 1/2"	1.625"	3.500"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
1 5/8"	1.750"	3.750"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
1 3/4"	1.875"	4.000"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
1 7/8"	2.000"	4.250"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
2"	2.125"	4.500"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
18-8 Stainless Steel
No. 10	0.250"	0.562"	0.036"-0.065"	Rockwell B68	USS Standards	50	000000000	0000
1/4"	0.312"	0.750"	0.051"-0.080"	Rockwell B68	USS Standards	50	000000000	00000
5/16"	0.375"	0.875"	0.064"-0.104"	Rockwell B68	USS Standards; ASME B18.21.1	25	000000000	00000
3/8"	0.438"	1.000"	0.064"-0.104"	Rockwell B68	USS Standards; ASME B18.21.1	10	000000000	0000
7/16"	0.500"	1.250"	0.064"-0.104"	Rockwell B68	USS Standards; ASME B18.21.1	10	000000000	0000
1/2"	0.562"	1.375"	0.086"-0.132"	Rockwell B68	USS Standards; ASME B18.21.1	10	000000000	00000
9/16"	0.625"	1.500"	0.086"-0.132"	Rockwell B68	USS Standards	5	000000000	0000
5/8"	0.688"	1.750"	0.108"-0.160"	Rockwell B68	USS Standards; ASME B18.21.1	5	000000000	00000
3/4"	0.812"	2.000"	0.122"-0.177"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
7/8"	0.938"	2.250"	0.136"-0.192"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
1"	1.062"	2.500"	0.136"-0.192"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
1 1/8"	1.250"	2.750"	0.136"-0.192"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
1 1/4"	1.375"	3.000"	0.136"-0.192"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
1 3/8"	1.500"	3.250"	0.153"-0.213"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
1 1/2"	1.625"	3.500"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
1 5/8"	1.750"	3.750"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
1 3/4"	1.875"	4.000"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
1 7/8"	2.000"	4.250"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
2"	2.125"	4.500"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
2 1/4"	2.375"	4.750"	0.193"-0.250"	Not Rated	USS Standards	1	000000000	00000
2 1/2"	2.625"	5.000"	0.210"-0.280"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
2 3/4"	2.875"	5.250"	0.228"-0.310"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
3"	3.125"	5.500"	0.249"-0.327"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
Black-Oxide 18-8 Stainless Steel
1/4"	0.312"	0.750"	0.051"-0.080"	Rockwell B68	USS Standards	25	000000000	0000
5/16"	0.375"	0.875"	0.064"-0.104"	Rockwell B68	USS Standards; ASME B18.21.1	25	000000000	00000
3/8"	0.438"	1.000"	0.064"-0.104"	Rockwell B68	USS Standards; ASME B18.21.1	10	000000000	00000
7/16"	0.500"	1.250"	0.064"-0.104"	Rockwell B68	USS Standards; ASME B18.21.1	10	000000000	00000
1/2"	0.562"	1.375"	0.086"-0.132"	Rockwell B68	USS Standards; ASME B18.21.1	5	000000000	00000
9/16"	0.625"	1.500"	0.086"-0.132"	Rockwell B68	USS Standards	5	000000000	00000
5/8"	0.688"	1.750"	0.108"-0.160"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
3/4"	0.812"	2.000"	0.122"-0.177"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
7/8"	0.938"	2.250"	0.136"-0.192"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
1"	1.062"	2.500"	0.136"-0.192"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
1 1/8"	1.250"	2.750"	0.136"-0.192"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	0000
1 1/4"	1.375"	3.000"	0.136"-0.192"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	00000
1 3/8"	1.500"	3.250"	0.153"-0.213"	Rockwell B68	USS Standards; ASME B18.21.1	1	000000000	00000
1 1/2"	1.625"	3.500"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
1 5/8"	1.750"	3.750"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
1 3/4"	1.875"	4.000"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
1 7/8"	2.000"	4.250"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
2"	2.125"	4.500"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	00000
Zinc-Plated Steel
No. 10	0.250"	0.562"	0.036"-0.065"	Not Rated	USS Standards	100	000000000	0000
No. 10	0.250"	0.562"	0.036"-0.065"	Not Rated	USS Standards	1,785	000000000	00000
1/4"	0.312"	0.750"	0.051"-0.080"	Not Rated	USS Standards	100	000000000	0000
1/4"	0.312"	0.750"	0.051"-0.080"	Not Rated	USS Standards	745	000000000	00000
5/16"	0.375"	0.875"	0.064"-0.104"	Not Rated	USS Standards; ASME B18.21.1	100	000000000	0000
5/16"	0.375"	0.875"	0.064"-0.104"	Not Rated	USS Standards; ASME B18.21.1	435	000000000	00000
3/8"	0.438"	1.000"	0.064"-0.104"	Not Rated	USS Standards; ASME B18.21.1	100	000000000	00000
3/8"	0.438"	1.000"	0.064"-0.104"	Not Rated	USS Standards; ASME B18.21.1	335	000000000	00000
7/16"	0.500"	1.250"	0.064"-0.104"	Not Rated	USS Standards; ASME B18.21.1	100	000000000	00000
1/2"	0.562"	1.375"	0.086"-0.132"	Not Rated	USS Standards; ASME B18.21.1	50	000000000	00000
9/16"	0.625"	1.469"	0.086"-0.132"	Not Rated	USS Standards; ASME B18.21.1	50	000000000	00000
5/8"	0.688"	1.750"	0.108"-0.160"	Not Rated	USS Standards; ASME B18.21.1	25	000000000	00000
3/4"	0.812"	2.000"	0.122"-0.177"	Not Rated	USS Standards; ASME B18.21.1	25	000000000	00000
7/8"	0.938"	2.250"	0.136"-0.192"	Not Rated	USS Standards; ASME B18.21.1	10	000000000	00000
1"	1.062"	2.500"	0.136"-0.192"	Not Rated	USS Standards; ASME B18.21.1	10	000000000	00000
1 1/8"	1.250"	2.750"	0.136"-0.192"	Not Rated	USS Standards; ASME B18.21.1	10	000000000	00000
1 1/4"	1.375"	3.000"	0.136"-0.192"	Not Rated	USS Standards; ASME B18.21.1	10	000000000	00000
1 3/8"	1.500"	3.250"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	5	000000000	00000
1 1/2"	1.625"	3.500"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	5	000000000	00000
1 5/8"	1.750"	3.750"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	5	000000000	00000
1 3/4"	1.875"	4.000"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	5	000000000	00000
1 7/8"	2.000"	4.250"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	0000
2"	2.125"	4.500"	0.153"-0.213"	Not Rated	USS Standards; ASME B18.21.1	5	000000000	00000
2 1/4"	2.375"	4.750"	0.193"-0.248"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	0000
2 1/2"	2.625"	5.000"	0.210"-0.280"	Not Rated	USS Standards; ASME B18.21.1	1	000000000	0000

About Washers