McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    221 Products

    General Purpose Washers

    Your go-to metal washer for every screw size. Washers take the pressure off nuts and screws to protect mounting surfaces.
    Steel
    Image of Product. Front orientation. Washers. General Purpose Washers.
    Image of Specification. Front orientation. Washers. General Purpose Washers.
    Zinc-Yellow-Chromate-Plated Steel—With the same corrosion resistance as zinc-plated steel, these withstand occasional exposure to moisture.
    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-Yellow-Chromate-Plated Steel
    1/4"
    		0.281"0.625"0.051" to 0.080"SAE Grade 8
    		ASME B18.21.1Material Certificate
    		10098023A115000000
    5/16"
    		0.344"0.688"0.051" to 0.080"SAE Grade 8
    		ASME B18.21.1Material Certificate
    		5098023A1160000
    3/8"
    		0.406"0.812"0.051" to 0.080"SAE Grade 8
    		ASME B18.21.1Material Certificate
    		5098023A11700000
    1/2"
    		0.531"1.062"0.074" to 0.121"SAE Grade 8
    		ASME B18.21.1Material Certificate
    		2598023A11800000
    5/8"
    		0.656"1.312"0.074" to 0.121"SAE Grade 8
    		ASME B18.21.1Material Certificate
    		1098023A1190000
    5/8"
    		0.656"1.312"0.122" to 0.146"SAE Grade 8
    		——2598023A03500000
    3/4"
    		0.812"1.469"0.108" to 0.160"SAE Grade 8
    		ASME B18.21.1Material Certificate
    		1098023A1210000
    1 3/4"
    		1.875"3.375"0.178" to 0.196"SAE Grade 8
    		——598023A04400000
    2"
    		2.125"3.750"0.178" to 0.196"SAE Grade 8
    		——198023A0450000
    2 1/4"
    		2.375"4.750"0.193" to 0.248"SAE Grade 8
    		——198026A12600000
    2 1/2"
    		2.625"5.000"0.210" to 0.280"SAE Grade 8
    		——198026A12700000
    2 3/4"
    		2.875"5.250"0.228" to 0.320"SAE Grade 8
    		——198026A12800000
    3"
    		3.125"5.500"0.249" to 0.327"SAE Grade 8
    		——198026A12900000
     
    Black Super-Corrosion-Resistant-Coated Steel
    1/4"
    		0.312"0.750"0.055" to 0.072"SAE Grade 8
    		—Material Certificate
    		1098026A11100000
    5/16"
    		0.375"0.875"0.064" to 0.080"SAE Grade 8
    		ASME B18.21.1Material Certificate
    		1098026A11200000
    3/8"
    		0.438"1.000"0.064" to 0.080"SAE Grade 8
    		ASME B18.21.1—598026A1130000
    7/16"
    		0.500"1.250"0.064" to 0.080"SAE Grade 8
    		ASME B18.21.1—598026A11400000
    1/2"
    		0.562"1.375"0.097" to 0.121"SAE Grade 8
    		ASME B18.21.1Material Certificate
    		598026A11500000
    9/16"
    		0.625"1.500"0.097" to 0.121"SAE Grade 8
    		—Material Certificate
    		598026A11600000
    5/8"
    		0.688"1.750"0.122" to 0.146"SAE Grade 8
    		ASME B18.21.1—198026A1170000
    3/4"
    		0.812"2.000"0.122" to 0.146"SAE Grade 8
    		ASME B18.21.1—198026A1180000
    7/8"
    		0.938"2.250"0.136" to 0.160"SAE Grade 8
    		ASME B18.21.1—198026A1190000
    1"
    		1.062"2.500"0.136" to 0.160"SAE Grade 8
    		ASME B18.21.1—198026A1210000
    1 1/8"
    		1.250"2.750"0.136" to 0.160"SAE Grade 8
    		ASME B18.21.1—198026A12200000
    1 1/4"
    		1.375"3.000"0.136" to 0.160"SAE Grade 8
    		ASME B18.21.1—198026A12300000
    1 3/8"
    		1.500"3.250"0.136" to 0.160"SAE Grade 8
    		——198026A12400000
    1 1/2"
    		1.625"3.500"0.136" to 0.160"SAE Grade 8
    		——198026A12500000
     

    SAE Washers

    Originally designed for the automotive industry, these washers conform to SAE sizing standards. They generally have smaller diameters than USS washers to fit in cramped spots and are thinner to create more precise gaps. Washers distribute pressure under screws and nuts to protect your mounting surface.
    Steel
    Image of Product. Front orientation. Washers. SAE 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.
    Highly Corrosion-Resistant Zinc-Flake-Coated Steel—With 40 times the corrosion resistance of zinc-plated steel, these withstand rust as well as 316 stainless steel. They have been tested to extreme standards, including 1,000 hours of salt spray. They are similar to Magni-coated washers.
    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.
    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
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    1/4"
    		0.281"0.625"0.051" to 0.080"SAE Grade 8
    		—2590126A22300000
    5/16"
    		0.344"0.688"0.051" to 0.080"SAE Grade 8
    		—2590126A2240000
    3/8"
    		0.406"0.812"0.051" to 0.080"SAE Grade 8
    		—2590126A2250000
    7/16"
    		0.469"0.922"0.051" to 0.080"SAE Grade 8
    		—2590126A2260000
    1/2"
    		0.531"1.062"0.074" to 0.121"SAE Grade 8
    		—1090126A2270000
    5/8"
    		0.656"1.312"0.074" to 0.121"SAE Grade 8
    		—590126A2280000
    3/4"
    		0.812"1.469"0.108" to 0.160"SAE Grade 8
    		—590126A22900000
    7/8"
    		0.938"1.750"0.108" to 0.160"SAE Grade 8
    		—190126A2310000
    1"
    		1.062"2.000"0.108" to 0.160"SAE Grade 8
    		—190126A2320000
    1 1/4"
    		1.375"2.500"0.136" to 0.192"SAE Grade 8
    		—190126A2330000
     
    Zinc-Yellow-Chromate-Plated Steel
    No. 2
    		0.094"0.250"0.016" to 0.025"SAE Grade 8
    		—10090126A2010000
    No. 4
    		0.125"0.312"0.028" to 0.036"SAE Grade 8
    		ASME B18.21.110098023A1110000
    No. 6
    		0.156"0.375"0.036" to 0.045"SAE Grade 8
    		ASME B18.21.110098023A1120000
    No. 8
    		0.188"0.438"0.036" to 0.065"SAE Grade 8
    		ASME B18.21.110098023A1130000
    No. 10
    		0.220"0.500"0.036" to 0.065"SAE Grade 8
    		ASME B18.21.110098023A1140000
    No. 12
    		0.250"0.562"0.051" to 0.080"SAE Grade 8
    		—5090126A20200000
    1/4"
    		0.281"0.625"0.051" to 0.080"SAE Grade 8
    		ASME B18.21.110098023A0290000
    5/16"
    		0.344"0.688"0.051" to 0.080"SAE Grade 8
    		ASME B18.21.15098023A0300000
    3/8"
    		0.406"0.812"0.051" to 0.080"SAE Grade 8
    		ASME B18.21.15098023A0310000
    7/16"
    		0.469"0.922"0.051" to 0.080"SAE Grade 8
    		ASME B18.21.12598023A0320000
    1/2"
    		0.531"1.062"0.074" to 0.121"SAE Grade 8
    		ASME B18.21.12598023A0330000
    9/16"
    		0.594"1.156"0.074" to 0.121"SAE Grade 8
    		ASME B18.21.12598023A0340000
    5/8"
    		0.656"1.312"0.122" to 0.146"SAE Grade 8
    		—2598189A66100000
    3/4"
    		0.812"1.469"0.108" to 0.160"SAE Grade 8
    		ASME B18.21.12098023A03600000
    7/8"
    		0.938"1.750"0.108" to 0.160"SAE Grade 8
    		ASME B18.21.11098023A0370000
    1"
    		1.062"2.000"0.108" to 0.160"SAE Grade 8
    		ASME B18.21.11098023A03800000
    1 1/8"
    		1.250"2.250"0.108" to 0.160"SAE Grade 8
    		ASME B18.21.11098023A03900000
    1 1/4"
    		1.375"2.500"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1598023A0410000
    1 3/8"
    		1.500"2.750"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1598023A04200000
    1 1/2"
    		1.625"3.000"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1598023A04300000
    1 5/8"
    		1.750"3.750"0.153" to 0.213"SAE Grade 8
    		ASME B18.21.1198023A0510000
    1 3/4"
    		1.875"3.375"0.178" to 0.196"SAE Grade 8
    		—598189A66700000
    1 7/8"
    		2.000"4.250"0.153" to 0.213"SAE Grade 8
    		ASME B18.21.1198023A0530000
    2"
    		2.125"3.750"0.178" to 0.196"SAE Grade 8
    		—198189A6850000
     
    Highly Corrosion-Resistant Zinc-Flake-Coated Steel
    No. 6
    		0.158"0.380"0.036" to 0.065"SAE Grade 8
    		ASME B18.21.11098180A1800000
    No. 8
    		0.190"0.443"0.036" to 0.065"SAE Grade 8
    		ASME B18.21.11098180A1900000
    No. 10
    		0.221"0.505"0.036" to 0.065"SAE Grade 8
    		ASME B18.21.11098180A2100000
    1/4"
    		0.281"0.625"0.055" to 0.065"SAE Grade 8
    		ASME B18.22.110098180A11000000
    5/16"
    		0.344"0.688"0.055" to 0.065"SAE Grade 8
    		ASME B18.22.15098180A1200000
    3/8"
    		0.406"0.812"0.055" to 0.065"SAE Grade 8
    		ASME B18.22.15098180A1300000
    7/16"
    		0.469"0.922"0.055" to 0.065"SAE Grade 8
    		ASME B18.22.12598180A1400000
    1/2"
    		0.531"1.062"0.097" to 0.177"SAE Grade 8
    		ASME B18.22.12598180A15000000
    9/16"
    		0.599"1.168"0.074" to 0.121"SAE Grade 8
    		ASME B18.21.1598180A2200000
    5/8"
    		0.688"1.312"0.122" to 0.177"SAE Grade 8
    		ASME B18.22.12598180A16000000
    3/4"
    		0.812"1.469"0.122" to 0.177"SAE Grade 8
    		ASME B18.22.12098180A17000000
    7/8"
    		0.950"1.762"0.108" to 0.160"SAE Grade 8
    		ASME B18.21.1198180A2300000
    1"
    		1.074"2.012"0.108" to 0.160"SAE Grade 8
    		ASME B18.21.1198180A2400000
    1 1/8"
    		1.262"2.243"0.108" to 0.160"SAE Grade 8
    		ASME B18.21.1198180A2500000
    1 1/4"
    		1.387"2.512"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1198180A2600000
    1 1/2"
    		1.637"3.012"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1198180A27000000
     
    Black Super-Corrosion-Resistant-Coated Steel
    1/4"
    		0.281"0.625"0.055" to 0.065"SAE Grade 8
    		ASME B18.21.1591434A1160000
    5/16"
    		0.344"0.688"0.055" to 0.065"SAE Grade 8
    		ASME B18.21.1591434A1170000
    3/8"
    		0.406"0.813"0.055" to 0.065"SAE Grade 8
    		ASME B18.21.1591434A1180000
    7/16"
    		0.469"0.922"0.055" to 0.065"SAE Grade 8
    		ASME B18.21.1591434A1190000
    1/2"
    		0.531"1.063"0.100" to 0.116"SAE Grade 8
    		ASME B18.21.1591434A12000000
    9/16"
    		0.594"1.188"0.100" to 0.116"SAE Grade 8
    		ASME B18.21.1591434A12100000
    5/8"
    		0.656"1.313"0.122" to 0.138"SAE Grade 8
    		ASME B18.21.1591434A12200000
    3/4"
    		0.813"1.469"0.122" to 0.138"SAE Grade 8
    		ASME B18.21.1191434A1230000
    7/8"
    		0.938"1.750"0.136" to 0.152"SAE Grade 8
    		ASME B18.21.1191434A1240000
    1"
    		1.063"2.000"0.136" to 0.160"SAE Grade 8
    		ASME B18.21.1191434A1250000
    1 1/4"
    		1.375"2.500"0.136" to 0.160"SAE Grade 8
    		ASME B18.21.1191434A1260000
    1 1/2"
    		1.625"3.000"0.136" to 0.160"SAE Grade 8
    		ASME B18.21.1191434A12700000
    1 3/4"
    		1.875"3.375"0.178" to 0.196"SAE Grade 8
    		ASME B18.21.1191434A12800000
    2"
    		2.125"3.750"0.178" to 0.196"SAE Grade 8
    		ASME B18.21.1191434A12900000
     

    Oversized Washers

    Cover oversized holes or use these washers as spacers and levelers. Compared to general purpose washers, these have a larger diameter or thickness.
    Steel
    Image of Product. Front orientation. Contains Annotated. Washers. Oversized Washers.
    Image of Specification. Front orientation. Washers. Oversized Washers.
    Zinc-Yellow-Chromate-Plated Steel—With the same corrosion resistance as zinc-plated steel, these withstand occasional exposure to moisture.
    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
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Zinc-Yellow-Chromate-Plated Steel
    1/4"
    		0.281"0.625"0.090" to 0.108"SAE Grade 8
    		Material Certificate
    		10098025A029000000
    1/4"
    		0.285"1.250"0.047" to 0.080"SAE Grade 8
    		—1090495A1110000
    1/4"
    		0.285"1.500"0.047" to 0.080"SAE Grade 8
    		—1090495A1120000
    1/4"
    		0.285"2.000"0.047" to 0.080"SAE Grade 8
    		—590495A1130000
    5/16"
    		0.344"0.688"0.090" to 0.108"SAE Grade 8
    		Material Certificate
    		5098025A03000000
    5/16"
    		0.348"1.000"0.047" to 0.080"SAE Grade 8
    		—2590495A1310000
    5/16"
    		0.348"1.250"0.047" to 0.080"SAE Grade 8
    		—1090495A1320000
    5/16"
    		0.348"1.500"0.047" to 0.080"SAE Grade 8
    		—1090495A1330000
    5/16"
    		0.348"2.000"0.047" to 0.080"SAE Grade 8
    		—590495A1340000
    3/8"
    		0.406"0.812"0.110" to 0.126"SAE Grade 8
    		Material Certificate
    		5098025A03100000
    3/8"
    		0.410"1.500"0.047" to 0.080"SAE Grade 8
    		—1090495A1510000
    3/8"
    		0.410"2.000"0.047" to 0.080"SAE Grade 8
    		—590495A1520000
    7/16"
    		0.469"0.922"0.110" to 0.126"SAE Grade 8
    		Material Certificate
    		2598025A1320000
    1/2"
    		0.531"1.062"0.190" to 0.208"SAE Grade 8
    		Material Certificate
    		2598025A13300000
    1/2"
    		0.531"1.500"0.056" to 0.071"SAE Grade 8
    		—1090495A1910000
    1/2"
    		0.531"3.000"0.085" to 0.101"SAE Grade 8
    		—190495A1930000
    1/2"
    		0.535"2.000"0.047" to 0.080"SAE Grade 8
    		—590495A1920000
    9/16"
    		0.594"1.172"0.168" to 0.191"SAE Grade 8
    		Material Certificate
    		1098025A03400000
    5/8"
    		0.656"1.312"0.206" to 0.229"SAE Grade 8
    		Material Certificate
    		1098025A03500000
    5/8"
    		0.688"1.500"0.110" to 0.140"SAE Grade 8
    		—590495A20100000
    5/8"
    		0.688"2.000"0.110" to 0.140"SAE Grade 8
    		—190495A2020000
    3/4"
    		0.812"1.469"0.206" to 0.229"SAE Grade 8
    		Material Certificate
    		1098025A03600000
    7/8"
    		0.938"1.750"0.235" to 0.264"SAE Grade 8
    		Material Certificate
    		598025A0370000
    1"
    		1.062"2.000"0.235" to 0.264"SAE Grade 8
    		—598025A0380000
    1 1/8"
    		1.188"2.250"0.235" to 0.264"SAE Grade 8
    		Material Certificate
    		598025A13900000
    1 1/4"
    		1.375"2.500"0.235" to 0.264"SAE Grade 8
    		Material Certificate
    		598025A04000000
    1 3/8"
    		1.438"2.750"0.235" to 0.264"SAE Grade 8
    		—198025A0430000
    1 1/2"
    		1.562"3.000"0.235" to 0.264"SAE Grade 8
    		Material Certificate
    		198025A0450000
     
    Black Super-Corrosion-Resistant-Coated Steel
    1/4"
    		0.313"0.750"0.090" to 0.110"SAE Grade 8
    		—593413A3110000
    5/16"
    		0.375"0.875"0.090" to 0.110"SAE Grade 8
    		—593413A3120000
    3/8"
    		0.438"1.000"0.110" to 0.126"SAE Grade 8
    		—593413A31300000
    7/16"
    		0.500"1.250"0.110" to 0.126"SAE Grade 8
    		—593413A31400000
    1/2"
    		0.563"1.375"0.156" to 0.188"SAE Grade 8
    		Material Certificate
    		193413A3150000
    9/16"
    		0.625"1.500"0.156" to 0.188"SAE Grade 8
    		—193413A3160000
    5/8"
    		0.688"1.750"0.170" to 0.195"SAE Grade 8
    		—193413A3170000
    3/4"
    		0.813"2.000"0.170" to 0.195"SAE Grade 8
    		—193413A3180000
    7/8"
    		0.938"2.250"0.235" to 0.265"SAE Grade 8
    		—193413A31900000
    1"
    		1.063"2.500"0.235" to 0.265"SAE Grade 8
    		—193413A32100000
     

    ASME Washers

    Also known as Type B washers, these meet ASME sizing standards. They take the pressure off screws and nuts to protect your mounting surface.
    Steel
    Image of Product. Front orientation. Washers. ASME 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.
    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
    ASME
    Designation
    ID
    OD
    Thk.
    For Fastener Strength
    Grade/Class
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    1/4"
    		Narrow0.281"0.500"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—5094744A501000000
    1/4"
    		Regular0.281"0.734"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—2594744A50200000
    5/16"
    		Narrow0.344"0.625"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—2594744A5030000
    3/8"
    		Narrow0.406"0.734"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—2594744A50400000
    3/8"
    		Regular0.406"1.000"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—2594744A50500000
    1/2"
    		Narrow0.531"1.000"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—2594744A50600000
    1/2"
    		Regular0.531"1.250"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—594744A50700000
    5/8"
    		Narrow0.656"1.250"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—594744A50800000
    5/8"
    		Regular0.656"1.750"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—194744A5090000
    3/4"
    		Narrow0.812"1.375"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—594744A51100000
    3/4"
    		Regular0.812"2.000"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—194744A5120000
    1"
    		Narrow1.062"1.750"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—194744A5130000
     
    Zinc-Yellow-Chromate-Plated Steel
    No. 8
    		Narrow0.188"0.375"0.036" to 0.045"SAE Grade 8
    		ASME B18.21.1—10090474A12500000
    No. 10
    		Narrow0.203"0.406"0.036" to 0.045"SAE Grade 8
    		ASME B18.21.1—10090474A12600000
    No. 10
    		Regular0.203"0.562"0.036" to 0.045"SAE Grade 8
    		ASME B18.21.1—10090474A12700000
    1/4"
    		Narrow0.281"0.500"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—5090474A11100000
    1/4"
    		Wide0.281"1.000"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1Material Certificate
    		2590474A12800000
    5/16"
    		Narrow0.344"0.625"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—2590474A1120000
    5/16"
    		Wide0.344"1.125"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—1090474A12900000
    3/8"
    		Narrow0.406"0.734"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—2590474A11300000
    3/8"
    		Wide0.406"1.250"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—590474A1140000
    7/16"
    		Narrow0.469"0.875"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—2590474A11500000
    7/16"
    		Regular0.469"1.125"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—1090474A13100000
    7/16"
    		Wide0.469"1.469"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—590474A13200000
    1/2"
    		Narrow0.531"1.000"0.056" to 0.071"SAE Grade 8
    		ASME B18.21.1—2590474A11600000
    1/2"
    		Regular0.531"1.250"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—590474A1170000
    1/2"
    		Wide0.531"1.750"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—590474A11800000
    5/8"
    		Wide0.656"2.250"0.146" to 0.174"SAE Grade 8
    		ASME B18.21.1—190474A11900000
    3/4"
    		Narrow0.812"1.375"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—590474A12100000
    3/4"
    		Wide0.812"2.500"0.146" to 0.174"SAE Grade 8
    		ASME B18.21.1—190474A12200000
    7/8"
    		Narrow0.938"1.469"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—590474A12300000
    1"
    		Narrow1.062"1.750"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—590474A12400000
    1"
    		Wide1.062"3.000"0.146" to 0.174"SAE Grade 8
    		ASME B18.21.1—190474A13300000
    1 1/8"
    		Narrow1.188"2.000"0.090" to 0.112"SAE Grade 8
    		ASME B18.21.1—190474A1340000
    1 1/4"
    		Narrow1.312"2.250"0.146" to 0.174"SAE Grade 8
    		ASME B18.21.1—190474A13500000
    1 1/2"
    		Narrow1.562"2.750"0.146" to 0.174"SAE Grade 8
    		ASME B18.21.1—190474A13600000
    1 3/4"
    		Narrow1.875"3.250"0.146" to 0.174"SAE Grade 8
    		ASME B18.21.1—190474A13700000
     

    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.
    Steel
    Image of Product. Front orientation. Washers. USS Washers.
    Zinc-Yellow-Chromate-Plated Steel—With the same corrosion resistance as zinc-plated steel, these withstand occasional exposure to moisture.
    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-Yellow-Chromate-Plated Steel
    No. 10
    		0.250"0.562"0.036" to 0.065"SAE Grade 8
    		——10090476A102000000
    1/4"
    		0.312"0.734"0.051" to 0.080"SAE Grade 8
    		ASME B18.21.1—10098026A02900000
    5/16"
    		0.375"0.875"0.064" to 0.104"SAE Grade 8
    		ASME B18.21.1—5098026A03000000
    3/8"
    		0.438"1.000"0.064" to 0.104"SAE Grade 8
    		ASME B18.21.1—5098026A03100000
    7/16"
    		0.500"1.250"0.064" to 0.104"SAE Grade 8
    		ASME B18.21.1—2598026A03200000
    1/2"
    		0.562"1.375"0.086" to 0.132"SAE Grade 8
    		ASME B18.21.1—2598026A03300000
    9/16"
    		0.625"1.469"0.086" to 0.132"SAE Grade 8
    		ASME B18.21.1—2598026A03400000
    5/8"
    		0.688"1.750"0.108" to 0.160"SAE Grade 8
    		ASME B18.21.1—2598026A03500000
    3/4"
    		0.812"2.000"0.122" to 0.177"SAE Grade 8
    		ASME B18.21.1—1098026A03600000
    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 1/8"
    		1.250"2.750"0.136" to 0.192"SAE Grade 8
    		ASME B18.21.1—598026A03900000
    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 Super-Corrosion-Resistant-Coated Steel
    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"SAE Grade 8
    		ASME B18.21.1—1098189A47200000
    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"SAE Grade 8
    		ASME B18.21.1—598189A47800000
    1/2"
    		0.562"1.375"0.086" to 0.132"SAE Grade 8
    		ASME B18.21.1—598189A49100000
    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"SAE Grade 8
    		ASME B18.21.1—198189A5580000
    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"SAE Grade 8
    		ASME B18.21.1—198189A5660000
    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"SAE Grade 8
    		ASME B18.21.1—198189A61800000
    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"SAE Grade 8
    		——198189A63000000
    1 1/2"
    		1.625"3.500"0.153" to 0.213"SAE Grade 8
    		——198189A65400000
     

    Split Lock Washers

    Image of Product. Front orientation. Lock Washers. Split-Lock Washer.
    Stop nuts and screws from loosening due to mild vibration. As you tighten, the uneven ends bite into the nut or screw so it won't back out. While they're not as vibration resistant as other lock washers, they are a great fit for electrical panels, light fixtures, and other light duty assemblies. Split lock washers are not reusable, and they only work with fasteners that have right-hand threads.
    Zinc-Yellow-Chromate-Plated Steel—With the same corrosion resistance as zinc-plated steel, these withstand occasional exposure to moisture.
    For Screw
    Size
    ID
    OD
    Thk.
    For Fastener Strength
    Grade/Class
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Yellow-Chromate-Plated Steel
    1/4"
    		0.260"0.487"0.062"SAE Grade 8
    		ASME B18.21.110091104A02900000
    5/16"
    		0.322"0.583"0.078"SAE Grade 8
    		ASME B18.21.110091104A0300000
    3/8"
    		0.385"0.680"0.094"SAE Grade 8
    		ASME B18.21.110091104A0310000
    7/16"
    		0.450"0.776"0.109"SAE Grade 8
    		ASME B18.21.110091104A03200000
    1/2"
    		0.512"0.869"0.125"SAE Grade 8
    		ASME B18.21.110091104A03300000
    9/16"
    		0.574"0.965"0.141"SAE Grade 8
    		ASME B18.21.15091104A03400000
    5/8"
    		0.641"1.073"0.156"SAE Grade 8
    		ASME B18.21.15091104A03500000
    3/4"
    		0.766"1.265"0.188"SAE Grade 8
    		ASME B18.21.12591104A04700000
    7/8"
    		0.894"1.459"0.219"SAE Grade 8
    		ASME B18.21.11091104A0480000
    1"
    		1.024"1.656"0.250"SAE Grade 8
    		ASME B18.21.11091104A04900000
    1 1/8"
    		1.153"1.903"0.345"SAE Grade 8
    		ASME B18.21.1591104A05000000
    1 1/4"
    		1.280"2.104"0.384"SAE Grade 8
    		ASME B18.21.1191104A0550000
    1 3/8"
    		1.408"2.301"0.422"SAE Grade 8
    		ASME B18.21.1191104A0600000
    1 1/2"
    		1.534"2.491"0.458"SAE Grade 8
    		ASME B18.21.1191104A06500000
    2"
    		2.039"3.144"0.496"SAE Grade 8
    		ASME B18.21.1191104A07000000
     

    Tooth Lock Washers

    Grip tighter than split lock washers to prevent nuts and screws from loosening in applications with constant movement, such as conveyors. Tooth lock washers typically can't be reused because the teeth often get bent when tightened.
    Internal Tooth
    Image of Product. Front orientation. Lock Washers. Tooth Washer, Internal Tooth.
    Internal teeth dig into the nut or screw to prevent it from backing out. Unlike external-tooth lock washers, these have a smooth outside edge, so they are less likely to mar your material or snag on objects. However, they don’t grip quite as well. Pair them with fasteners that have small diameters, such as fillister and cheese head screws.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    For Screw
    Size
    ID
    OD
    Thk.
    For Fastener Strength
    Grade/Class
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    1/4"
    		0.256"0.536"0.034" to 0.044"SAE Grade 8
    		ASME B18.21.110091150A110000000
    5/16"
    		0.320"0.607"0.040" to 0.050"SAE Grade 8
    		ASME B18.21.15091150A11300000
    3/8"
    		0.384"0.747"0.040" to 0.050"SAE Grade 8
    		ASME B18.21.12591150A11400000
    1/2"
    		0.512"0.923"0.054" to 0.070"SAE Grade 8
    		ASME B18.21.11091150A12000000
    5/8"
    		0.640"1.134"0.054" to 0.070"SAE Grade 8
    		ASME B18.21.1591150A12600000
    3/4"
    		0.769"1.260"0.073" to 0.083"SAE Grade 8
    		ASME B18.21.1591150A13000000
     
    back to top