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    219 Products

    Washer Type

    Performance

    Performance

    USS Washers

    These washers meet USS sizing specifications and typically have larger diameters than SAE washers. As a result, they accommodate larger screws and nuts and distribute pressure across a wider surface area. They are also thicker, so they withstand heavier loads and span wider gaps when used as spacers.
    Stainless SteelAbout Stainless Steel
    Image of Product. Front orientation. Washers. USS Washers.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these washers resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these washers have a dark, matte coating to create a finished look. They resist rust in wet and outdoor environments, but won't hold up to harsh chemicals as well as 316 stainless steel.
    Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these washers won't degrade when exposed to harsh weather, salt water, and most chemicals.
    High-Temperature High-Strength A286 Stainless Steel—These washers resist high temperatures up to 1300° F. In addition, they are stronger than 316 stainless steel and withstand chemicals, such as bleach and chlorine. However, they won't hold up to salt water as well as 316 stainless steel.
    Material Certificate—Washers include a report with a traceable lot number.
    For Screw
    Size
    ID
    OD
    Thk.
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    No. 10
    		0.250"0.562"0.036" to 0.065"—Material Certificate
    		5093852A10100000
    1/4"
    		0.312"0.750"0.051" to 0.080"—Material Certificate
    		5093852A10200000
    5/16"
    		0.375"0.875"0.064" to 0.104"ASME B18.21.1Material Certificate
    		2593852A10300000
    3/8"
    		0.438"1.000"0.064" to 0.104"ASME B18.21.1Material Certificate
    		1093852A1040000
    7/16"
    		0.500"1.250"0.064" to 0.104"ASME B18.21.1—1093852A1050000
    1/2"
    		0.562"1.375"0.086" to 0.132"ASME B18.21.1Material Certificate
    		1093852A11300000
    9/16"
    		0.625"1.500"0.086" to 0.132"—Material Certificate
    		593852A1060000
    5/8"
    		0.688"1.750"0.108" to 0.160"ASME B18.21.1Material Certificate
    		593852A10700000
    3/4"
    		0.812"2.000"0.122" to 0.177"ASME B18.21.1—193852A1080000
    7/8"
    		0.938"2.250"0.136" to 0.192"ASME B18.21.1—193852A1090000
    1"
    		1.062"2.500"0.136" to 0.192"ASME B18.21.1—193852A1100000
    1 1/8"
    		1.250"2.750"0.136" to 0.192"ASME B18.21.1—193852A1430000
    1 1/4"
    		1.375"3.000"0.136" to 0.192"ASME B18.21.1—193852A1440000
    1 3/8"
    		1.500"3.250"0.153" to 0.213"ASME B18.21.1—193852A1450000
    1 1/2"
    		1.625"3.500"0.153" to 0.213"ASME B18.21.1—193852A15100000
    1 5/8"
    		1.750"3.750"0.153" to 0.213"ASME B18.21.1—193852A15200000
    1 3/4"
    		1.875"4.000"0.153" to 0.213"ASME B18.21.1—193852A15300000
    1 7/8"
    		2.000"4.250"0.153" to 0.213"ASME B18.21.1—193852A15400000
    2"
    		2.125"4.500"0.153" to 0.213"ASME B18.21.1—193852A15500000
    2 1/4"
    		2.375"4.750"0.193" to 0.250"——193852A15600000
    2 1/2"
    		2.625"5.000"0.210" to 0.280"ASME B18.21.1—193852A15700000
    2 3/4"
    		2.875"5.250"0.228" to 0.310"ASME B18.21.1—193852A15800000
    3"
    		3.125"5.500"0.249" to 0.327"ASME B18.21.1—193852A15900000
     
    Black-Oxide 18-8 Stainless Steel
    1/4"
    		0.312"0.750"0.051" to 0.080"——2593852A1710000
    5/16"
    		0.375"0.875"0.064" to 0.104"ASME B18.21.1—2593852A17200000
    3/8"
    		0.438"1.000"0.064" to 0.104"ASME B18.21.1—1093852A17300000
    7/16"
    		0.500"1.250"0.064" to 0.104"ASME B18.21.1—1093852A17400000
    1/2"
    		0.562"1.375"0.086" to 0.132"ASME B18.21.1—593852A17500000
    9/16"
    		0.625"1.500"0.086" to 0.132"——593852A17600000
    5/8"
    		0.688"1.750"0.108" to 0.160"ASME B18.21.1—193852A1770000
    3/4"
    		0.812"2.000"0.122" to 0.177"ASME B18.21.1—193852A1780000
    7/8"
    		0.938"2.250"0.136" to 0.192"ASME B18.21.1Material Certificate
    		193852A1790000
    1"
    		1.062"2.500"0.136" to 0.192"ASME B18.21.1—193852A1810000
    1 1/8"
    		1.250"2.750"0.136" to 0.192"ASME B18.21.1Material Certificate
    		193852A1820000
    1 1/4"
    		1.375"3.000"0.136" to 0.192"ASME B18.21.1Material Certificate
    		193852A18300000
    1 3/8"
    		1.500"3.250"0.153" to 0.213"ASME B18.21.1—193852A18400000
    1 1/2"
    		1.625"3.500"0.153" to 0.213"ASME B18.21.1—193852A16500000
    1 5/8"
    		1.750"3.750"0.153" to 0.213"ASME B18.21.1—193852A16200000
    1 3/4"
    		1.875"4.000"0.153" to 0.213"ASME B18.21.1—193852A16100000
    1 7/8"
    		2.000"4.250"0.153" to 0.213"ASME B18.21.1—193852A16300000
    2"
    		2.125"4.500"0.153" to 0.213"ASME B18.21.1—193852A16400000
     
    Highly Corrosion-Resistant 316 Stainless Steel
    1/4"
    		0.312"0.750"0.051" to 0.080"—Material Certificate
    		5093852A13100000
    5/16"
    		0.375"0.875"0.064" to 0.104"ASME B18.21.1Material Certificate
    		2593852A13200000
    3/8"
    		0.438"1.000"0.064" to 0.104"ASME B18.21.1Material Certificate
    		1093852A1330000
    7/16"
    		0.500"1.250"0.064" to 0.104"ASME B18.21.1—1093852A13400000
    1/2"
    		0.562"1.375"0.086" to 0.132"ASME B18.21.1Material Certificate
    		593852A13500000
    9/16"
    		0.625"1.500"0.086" to 0.132"——593852A13600000
    5/8"
    		0.688"1.750"0.108" to 0.160"ASME B18.21.1Material Certificate
    		593852A13700000
    3/4"
    		0.812"2.000"0.122" to 0.177"ASME B18.21.1—193852A1380000
    7/8"
    		0.938"2.250"0.136" to 0.192"ASME B18.21.1—193852A1210000
    1"
    		1.062"2.500"0.136" to 0.192"ASME B18.21.1Material Certificate
    		193852A1390000
    1 1/8"
    		1.250"2.750"0.136" to 0.192"ASME B18.21.1—193852A1410000
    1 1/4"
    		1.375"3.000"0.136" to 0.192"ASME B18.21.1—193852A12200000
    1 3/8"
    		1.500"3.250"0.153" to 0.213"ASME B18.21.1—193852A14200000
    1 1/2"
    		1.625"3.500"0.153" to 0.213"ASME B18.21.1—193852A12300000
    1 5/8"
    		1.750"3.750"0.153" to 0.213"ASME B18.21.1—193852A12400000
    1 3/4"
    		1.875"4.000"0.153" to 0.213"ASME B18.21.1—193852A12500000
    1 7/8"
    		2.000"4.250"0.153" to 0.213"ASME B18.21.1—193852A12600000
    2"
    		2.125"4.500"0.153" to 0.213"ASME B18.21.1—193852A12700000
     
    High-Temperature High-Strength A286 Stainless Steel
    1/4"
    		0.312"0.734"0.051" to 0.080"ASME B18.21.1—198189A11200000
    5/16"
    		0.375"0.875"0.064" to 0.104"ASME B18.21.1—198189A12400000
    3/8"
    		0.438"1.000"0.064" to 0.104"ASME B18.21.1—198189A13900000
    1/2"
    		0.562"1.375"0.086" to 0.132"ASME B18.21.1—198189A17500000
     
    Steel
    Image of Product. Front orientation. Washers. USS Washers.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Zinc-Yellow-Chromate-Plated Steel—With the same corrosion resistance as zinc-plated steel, these withstand occasional exposure to moisture.
    Black-Oxide Steel—Typically chosen for their appearance, these washers have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Steel—Best for dry environments since moisture will cause these washers to rust.
    Corrosion-Resistant Galvanized Steel—These washers combine the strength of steel with the rust resistance of stainless steel. They're an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals.
    Corrosion-Resistant Chrome-Plated Steel—The brightest, shiniest finish we offer, this plating has a mirror-like appearance that is often used in decorative applications. It resists salt water and chemicals better than zinc plating and is less likely to wear off.
    Black Super-Corrosion-Resistant-Coated Steel—Combines a finished appearance with the rust resistance of 316 stainless steel. The coating has been tested to extreme standards, including 1,000 hours of salt spray resistance, to hold up in wet and outdoor environments. Also known as black luster.
    Material Certificate—Washers include a report with a traceable lot number.
    For Fastener Strength Grade/Class—If you require screws or nuts with a specific fastener strength rating, make sure your washer matches the grade or class.
    For Screw
    Size
    ID
    OD
    Thk.
    For Fastener Strength
    Grade/Class
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    No. 10
    		0.250"0.562"0.036" to 0.065"———10090108A41100000
    No. 10
    		0.250"0.562"0.036" to 0.065"———1,78590108A02700000
    1/4"
    		0.312"0.750"0.051" to 0.080"———10090108A4130000
    1/4"
    		0.312"0.750"0.051" to 0.080"———74590108A02900000
    1/4"
    		0.313"0.750"0.051" to 0.080"SAE Grade 5
    		——5090108A17100000
    5/16"
    		0.375"0.875"0.064" to 0.104"—ASME B18.21.1—10090108A4150000
    5/16"
    		0.375"0.875"0.064" to 0.104"—ASME B18.21.1—43590108A03000000
    5/16"
    		0.375"0.875"0.064" to 0.104"SAE Grade 5
    		ASME B18.21.1—2590108A17200000
    3/8"
    		0.438"1.000"0.064" to 0.104"—ASME B18.21.1—10090108A41700000
    3/8"
    		0.438"1.000"0.064" to 0.104"—ASME B18.21.1—33590108A03100000
    3/8"
    		0.438"1.000"0.064" to 0.104"SAE Grade 5
    		ASME B18.21.1—1090108A1730000
    7/16"
    		0.500"1.250"0.064" to 0.104"—ASME B18.21.1—10090108A03200000
    1/2"
    		0.562"1.375"0.086" to 0.132"—ASME B18.21.1—5090108A03300000
    1/2"
    		0.563"1.375"0.086" to 0.132"SAE Grade 5
    		ASME B18.21.1—1090108A17400000
    9/16"
    		0.625"1.469"0.086" to 0.132"—ASME B18.21.1—5090108A03400000
    5/8"
    		0.688"1.750"0.108" to 0.160"—ASME B18.21.1—2590108A03500000
    5/8"
    		0.688"1.750"0.108" to 0.160"SAE Grade 5
    		ASME B18.21.1—590108A17500000
    3/4"
    		0.812"2.000"0.122" to 0.177"—ASME B18.21.1—2590108A03600000
    3/4"
    		0.813"2.000"0.122" to 0.177"SAE Grade 5
    		ASME B18.21.1—190108A1760000
    7/8"
    		0.938"2.250"0.136" to 0.192"—ASME B18.21.1—1090108A03700000
    1"
    		1.062"2.500"0.136" to 0.192"—ASME B18.21.1—1090108A03800000
    1 1/8"
    		1.250"2.750"0.136" to 0.192"—ASME B18.21.1—1090108A03900000
    1 1/4"
    		1.375"3.000"0.136" to 0.192"—ASME B18.21.1—1090108A04000000
    1 3/8"
    		1.500"3.250"0.153" to 0.213"—ASME B18.21.1—590108A04200000
    1 1/2"
    		1.625"3.500"0.153" to 0.213"—ASME B18.21.1—590108A04100000
    1 5/8"
    		1.750"3.750"0.153" to 0.213"—ASME B18.21.1—590108A04300000
    1 3/4"
    		1.875"4.000"0.153" to 0.213"—ASME B18.21.1—590108A04400000
    1 7/8"
    		2.000"4.250"0.153" to 0.213"—ASME B18.21.1—190108A4190000
    2"
    		2.125"4.500"0.153" to 0.213"—ASME B18.21.1—590108A04600000
    2 1/4"
    		2.375"4.750"0.193" to 0.248"—ASME B18.21.1—190108A0470000
    2 1/2"
    		2.625"5.000"0.210" to 0.280"—ASME B18.21.1—190108A0480000
    3"
    		3.125"5.500"0.249" to 0.327"—ASME B18.21.1—190108A0500000
     
    Zinc-Yellow-Chromate-Plated Steel
    No. 10
    		0.250"0.562"0.036" to 0.065"SAE Grade 8
    		——10090476A10200000
    1/4"
    		0.266"0.760"0.065" to 0.080"SAE Grade 9
    		ASME B18.21.1—1090476A1110000
    1/4"
    		0.312"0.734"0.051" to 0.080"SAE Grade 8
    		ASME B18.21.1—10098026A02900000
    5/16"
    		0.329"0.885"0.079" to 0.093"SAE Grade 9
    		ASME B18.21.1—1090476A1120000
    5/16"
    		0.375"0.875"0.064" to 0.104"SAE Grade 8
    		ASME B18.21.1—5098026A03000000
    3/8"
    		0.391"1.010"0.079" to 0.093"SAE Grade 9
    		ASME B18.21.1—1090476A11300000
    3/8"
    		0.438"1.000"0.064" to 0.104"SAE Grade 8
    		ASME B18.21.1—5098026A03100000
    7/16"
    		0.454"1.260"0.090" to 0.106"SAE Grade 9
    		ASME B18.21.1—590476A1170000
    7/16"
    		0.500"1.250"0.064" to 0.104"SAE Grade 8
    		ASME B18.21.1—2598026A03200000
    1/2"
    		0.521"1.385"0.122" to 0.146"SAE Grade 9
    		ASME B18.21.1—190476A1140000
    1/2"
    		0.562"1.375"0.086" to 0.132"SAE Grade 8
    		ASME B18.21.1—2598026A03300000
    9/16"
    		0.583"1.510"0.122" to 0.146"SAE Grade 9
    		ASME B18.21.1—190476A1180000
    9/16"
    		0.625"1.469"0.086" to 0.132"SAE Grade 8
    		ASME B18.21.1—2598026A03400000
    5/8"
    		0.641"1.760"0.136" to 0.160"SAE Grade 9
    		ASME B18.21.1—190476A1150000
    5/8"
    		0.688"1.750"0.108" to 0.160"SAE Grade 8
    		ASME B18.21.1—2598026A03500000
    3/4"
    		0.770"2.015"0.136" to 0.160"SAE Grade 9
    		ASME B18.21.1—190476A1160000
    3/4"
    		0.812"2.000"0.122" to 0.177"SAE Grade 8
    		ASME B18.21.1—1098026A03600000
    7/8"
    		0.891"2.265"0.136" to 0.160"SAE Grade 9
    		ASME B18.21.1—190476A11900000
    7/8"
    		0.938"2.250"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1—1098026A03700000
    1"
    		1.062"2.500"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1—598026A03800000
    1"
    		1.081"2.515"0.136" to 0.160"SAE Grade 9
    		ASME B18.21.1—190476A12100000
    1 1/8"
    		1.250"2.750"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1—598026A03900000
    1 1/4"
    		1.365"3.030"0.168" to 0.195"SAE Grade 9
    		ASME B18.21.1—190476A12200000
    1 1/4"
    		1.375"3.000"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1—598026A04000000
    1 3/8"
    		1.500"3.250"0.136" to 0.160"SAE Grade 8
    		ASME B18.21.1—198026A0410000
    1 1/2"
    		1.625"3.500"0.136" to 0.160"SAE Grade 8
    		ASME B18.21.1—198026A0420000
    2"
    		2.125"4.500"0.153" to 0.213"SAE Grade 8
    		ASME B18.21.1Material Certificate
    		190476A10100000
    2 1/4"
    		2.375"4.750"0.193" to 0.248"SAE Grade 8
    		——198189A18700000
    2 1/2"
    		2.625"5.000"0.210" to 0.280"SAE Grade 8
    		——198189A19800000
    2 3/4"
    		2.875"5.250"0.228" to 0.320"SAE Grade 8
    		——198189A20100000
    3"
    		3.125"5.500"0.249" to 0.327"SAE Grade 8
    		——198189A24600000
     
    Black-Oxide Steel
    No. 10
    		0.250"0.562"0.036" to 0.065"———10091081A17100000
     
    Steel
    No. 10
    		0.250"0.562"0.036" to 0.065"———10091081A1270000
    No. 10
    		0.250"0.562"0.036" to 0.065"———1,78591081A02700000
    1/4"
    		0.312"0.750"0.051" to 0.080"———10091081A1290000
    1/4"
    		0.312"0.750"0.051" to 0.080"———74591081A02900000
    5/16"
    		0.375"0.875"0.064" to 0.104"—ASME B18.21.1—10091081A1300000
    5/16"
    		0.375"0.875"0.064" to 0.104"—ASME B18.21.1—43591081A03000000
    3/8"
    		0.438"1.000"0.064" to 0.104"—ASME B18.21.1—10091081A13100000
    3/8"
    		0.438"1.000"0.064" to 0.104"—ASME B18.21.1—33591081A03100000
    7/16"
    		0.500"1.250"0.064" to 0.104"—ASME B18.21.1—18591081A03200000
    1/2"
    		0.562"1.375"0.086" to 0.132"—ASME B18.21.1—13091081A03300000
    9/16"
    		0.625"1.469"0.086" to 0.132"—ASME B18.21.1—11091081A03400000
    5/8"
    		0.688"1.750"0.108" to 0.160"—ASME B18.21.1—6591081A03500000
    3/4"
    		0.812"2.000"0.122" to 0.177"—ASME B18.21.1—4591081A03600000
    7/8"
    		0.938"2.250"0.136" to 0.192"—ASME B18.21.1—3291081A03700000
    1"
    		1.062"2.500"0.136" to 0.192"—ASME B18.21.1—2691081A03800000
    1 1/8"
    		1.250"2.750"0.136" to 0.192"—ASME B18.21.1—1091081A03900000
    1 1/4"
    		1.375"3.000"0.136" to 0.192"—ASME B18.21.1—1091081A04000000
    1 3/8"
    		1.500"3.250"0.153" to 0.213"—ASME B18.21.1—591081A0420000
    1 1/2"
    		1.625"3.500"0.153" to 0.213"—ASME B18.21.1—591081A04100000
    1 5/8"
    		1.750"3.750"0.153" to 0.213"—ASME B18.21.1—591081A04300000
    1 3/4"
    		1.875"4.000"0.153" to 0.213"—ASME B18.21.1—591081A04400000
    1 7/8"
    		2.000"4.250"0.153" to 0.213"—ASME B18.21.1—191081A3520000
    2"
    		2.125"4.500"0.153" to 0.213"—ASME B18.21.1—191081A0460000
    2 1/4"
    		2.375"4.750"0.193" to 0.248"—ASME B18.21.1—191081A0470000
    2 1/2"
    		2.625"5.000"0.210" to 0.280"—ASME B18.21.1—191081A0480000
    3"
    		3.125"5.500"0.249" to 0.327"—ASME B18.21.1—191081A0500000
     
    Corrosion-Resistant Galvanized Steel
    1/4"
    		0.312"0.750"0.051" to 0.080"—ASME B18.21.1—10098970A1290000
    5/16"
    		0.375"0.875"0.064" to 0.104"—ASME B18.21.1—10098970A13000000
    3/8"
    		0.438"1.000"0.064" to 0.104"—ASME B18.21.1—10098970A13100000
    7/16"
    		0.500"1.250"0.064" to 0.104"—ASME B18.21.1—10098970A13200000
    1/2"
    		0.562"1.375"0.086" to 0.132"—ASME B18.21.1—5098970A13300000
    9/16"
    		0.625"1.469"0.086" to 0.132"—ASME B18.21.1—2598970A3110000
    5/8"
    		0.688"1.750"0.108" to 0.160"—ASME B18.21.1—2598970A13500000
    3/4"
    		0.812"2.000"0.122" to 0.177"—ASME B18.21.1—2598970A13600000
    7/8"
    		0.938"2.250"0.136" to 0.192"—ASME B18.21.1Material Certificate
    		1098970A13700000
    1"
    		1.062"2.500"0.136" to 0.192"—ASME B18.21.1—1098970A13800000
    1 1/8"
    		1.250"2.750"0.136" to 0.192"—ASME B18.21.1—1098970A31200000
    1 1/4"
    		1.375"3.000"0.136" to 0.192"—ASME B18.21.1—1098970A14100000
    1 3/8"
    		1.500"3.250"0.153" to 0.213"—ASME B18.21.1—598970A31300000
    1 1/2"
    		1.625"3.500"0.153" to 0.213"—ASME B18.21.1—598970A14300000
    1 5/8"
    		1.750"3.750"0.153" to 0.213"—ASME B18.21.1—598970A31400000
    1 3/4"
    		1.875"4.000"0.153" to 0.213"—ASME B18.21.1—598970A31500000
    1 7/8"
    		2.000"4.250"0.153" to 0.213"—ASME B18.21.1—598970A31600000
    2"
    		2.125"4.500"0.153" to 0.213"—ASME B18.21.1—198970A3170000
    2 1/4"
    		2.375"4.750"0.193" to 0.248"—ASME B18.21.1—198970A3180000
    2 1/2"
    		2.625"5.000"0.210" to 0.280"—ASME B18.21.1—198970A3190000
    2 3/4"
    		2.875"5.250"0.228" to 0.310"—ASME B18.21.1—198970A33100000
    3"
    		3.125"5.500"0.249" to 0.327"—ASME B18.21.1—198970A3320000
     
    Corrosion-Resistant Chrome-Plated Steel
    No. 10
    		0.250"0.562"0.036" to 0.065"—ASME B18.21.1—1091081A15100000
     
    Black Super-Corrosion-Resistant-Coated Steel
    1/4"
    		0.312"0.750"0.051" to 0.080"—ASME B18.21.1—1096582A30400000
    1/4"
    		0.312"0.750"0.051" to 0.080"SAE Grade 8
    		——1098189A45200000
    5/16"
    		0.375"0.875"0.064" to 0.104"—ASME B18.21.1—1096582A32100000
    5/16"
    		0.375"0.875"0.064" to 0.104"SAE Grade 8
    		ASME B18.21.1—1098189A47200000
    3/8"
    		0.438"1.000"0.064" to 0.104"—ASME B18.21.1—1096582A33800000
    3/8"
    		0.438"1.000"0.064" to 0.104"SAE Grade 8
    		ASME B18.21.1—598189A4740000
    7/16"
    		0.500"1.250"0.064" to 0.104"—ASME B18.21.1—1096582A43100000
    7/16"
    		0.500"1.250"0.064" to 0.104"SAE Grade 8
    		ASME B18.21.1—598189A47800000
    1/2"
    		0.562"1.375"0.086" to 0.132"—ASME B18.21.1—596582A3520000
    1/2"
    		0.562"1.375"0.086" to 0.132"SAE Grade 8
    		ASME B18.21.1—598189A49100000
    9/16"
    		0.625"1.469"0.086" to 0.132"—ASME B18.21.1—596582A43200000
    9/16"
    		0.625"1.500"0.086" to 0.132"SAE Grade 8
    		——598189A52500000
    5/8"
    		0.688"1.750"0.108" to 0.160"—ASME B18.21.1—596582A3710000
    5/8"
    		0.688"1.750"0.108" to 0.160"SAE Grade 8
    		ASME B18.21.1—198189A5580000
    3/4"
    		0.812"2.000"0.122" to 0.177"—ASME B18.21.1—596582A38900000
    3/4"
    		0.812"2.000"0.122" to 0.177"SAE Grade 8
    		ASME B18.21.1—198189A5600000
    7/8"
    		0.938"2.250"0.136" to 0.192"—ASME B18.21.1—596582A40600000
    7/8"
    		0.938"2.250"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1—198189A5660000
    1"
    		1.062"2.500"0.136" to 0.192"—ASME B18.21.1—596582A42300000
    1"
    		1.062"2.500"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1—198189A6030000
    1 1/8"
    		1.250"2.750"0.136" to 0.192"—ASME B18.21.1—196582A4330000
    1 1/8"
    		1.250"2.750"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1—198189A61800000
    1 1/4"
    		1.375"3.000"0.136" to 0.192"—ASME B18.21.1—196582A4340000
    1 1/4"
    		1.375"3.000"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1—198189A62600000
    1 3/8"
    		1.500"3.250"0.153" to 0.213"—ASME B18.21.1—196582A4350000
    1 3/8"
    		1.500"3.250"0.153" to 0.213"SAE Grade 8
    		——198189A63000000
    1 1/2"
    		1.625"3.500"0.153" to 0.213"—ASME B18.21.1—196582A4360000
    1 1/2"
    		1.625"3.500"0.153" to 0.213"SAE Grade 8
    		——198189A65400000
    1 5/8"
    		1.750"3.750"0.153" to 0.213"—ASME B18.21.1—196582A4370000
    1 3/4"
    		1.875"4.000"0.153" to 0.213"—ASME B18.21.1—196582A4380000
    1 7/8"
    		2.000"4.250"0.153" to 0.213"—ASME B18.21.1—196582A4390000
    2"
    		2.125"4.500"0.153" to 0.213"—ASME B18.21.1—196582A44100000
    2 1/4"
    		2.375"4.750"0.193" to 0.248"—ASME B18.21.1—196582A44200000
    2 1/2"
    		2.625"5.000"0.210" to 0.280"—ASME B18.21.1—196582A44300000
    2 3/4"
    		2.875"5.250"0.228" to 0.310"—ASME B18.21.1—196582A44400000
    3"
    		3.125"5.500"0.249" to 0.327"—ASME B18.21.1—196582A44500000
     
    AluminumAbout Aluminum
    Image of Product. Front orientation. Washers. USS Washers.
    One-third the weight of steel, these washers are commonly used in robotics, automation, and other applications that have weight limits. They're an alternative to stainless steel for rust resistance, but aren't as strong.
    For Screw
    Size
    ID
    OD
    Thk.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Aluminum
    1/4"
    		0.312"0.750"0.051" to 0.080"—5090459A101000000
    5/16"
    		0.375"0.875"0.064" to 0.104"ASME B18.21.15090459A10200000
    1/2"
    		0.562"1.375"0.086" to 0.132"ASME B18.21.11090459A10300000
    3/4"
    		0.812"1.875"0.081" to 0.101"—1093286A02300000
     
    Brass
    Image of Product. Front orientation. Washers. USS Washers.
    Softer than most metals, brass washers won't damage other fastening components.
    Nickel-Plated Brass—The nickel plating offers better corrosion resistance than plain brass to stand up to solvents, salt water, and chemicals. The plating can wear off over time, so these washers are not recommended for applications that experience a lot of friction or wear.
    For Screw
    Size
    ID
    OD
    Thk.
    Pkg.
    Qty.
    Pkg.
    Nickel-Plated Brass
    1/4"
    		0.313"0.750"0.051" to 0.080"2090463A101000000
     
    Copper
    Image of Product. Front orientation. Washers. USS Washers.
    These have the best conductivity of all our metal washers. They're often used to secure electrical connections inside breaker panels and to fasten components on printed circuit boards. They're also the softest of all our metal washers, so they won't damage screws and nuts. However, copper washers aren't as corrosion resistant as brass washers, and will develop a green patina over time.
    For Screw
    Size
    ID
    OD
    Thk.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Copper
    5/16"
    		0.375"0.875"0.064" to 0.104"ASME B18.21.11090461A101000000
     

    USS Washer Assortments

    Image of Product. Front orientation. Washers. USS Washer Assortments.
    These assortments offer a range of sizes that all meet USS specifications. USS washers typically have larger diameters than SAE washers to accommodate larger nuts and screws and to distribute pressure across a wider surface area. They are also thicker, so they withstand heavier loads and span wider gaps when used as spacers. Labels in the lid include our part numbers, so it's easy to replenish the assortments.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    No. of
    Pieces
    Sizes Included
    Container
    Type
    Each
    Zinc-Plated Steel
    590For 1/4" to 3/4" Screw SizesPlastic Box91535A110000000
     
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