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    50 Products

    Structural Washers

    Distribute pressure under structural screws and nuts in columns, joists, and I-beams. These thick washers are tested and certified to meet industry standards for handling high-stress loads.
    Steel
    Image of Product. Front orientation. Washers. Structural Washers.
    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.
    Highly Corrosion-Resistant Zinc-Flake-Coated Steel—With 5 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 720 hours of salt spray. They are similar to Magni-coated washers.
    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.
    Steel
    1/2"
    		0.531"1.062"0.097" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—10098038A265000000
    5/8"
    		0.688"1.312"0.122" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—5098038A26800000
    3/4"
    		0.812"1.469"0.122" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—5098038A27400000
    7/8"
    		0.938"1.750"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—2598038A27900000
    1"
    		1.062"2.000"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—2598038A28200000
    1 1/8"
    		1.188"2.250"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—1098038A2850000
    1 1/4"
    		1.375"2.500"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASME B18.21.1, ASTM F436 Type 1—1098038A28900000
    1 3/8"
    		1.531"2.750"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—1098038A1110000
    1 1/2"
    		1.625"3.000"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASME B18.21.1, ASTM F436 Type 1—1098038A29300000
    1 5/8"
    		1.770"3.250"0.178" to 0.280"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—598038A1120000
    1 3/4"
    		1.875"3.375"0.178" to 0.280"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—598038A31100000
    1 7/8"
    		2.000"3.500"0.178" to 0.280"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—598038A11300000
    2"
    		2.125"3.750"0.178" to 0.280"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—598038A31200000
    2 1/4"
    		2.407"4.000"0.240" to 0.340"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—198038A1140000
    2 1/2"
    		2.657"4.500"0.240" to 0.340"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—198038A3130000
    2 3/4"
    		2.907"5.000"0.240" to 0.340"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—198038A1150000
    3"
    		3.157"5.500"0.240" to 0.340"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—198038A3140000
     
    Corrosion-Resistant Galvanized Steel
    1/2"
    		0.531"1.062"0.097" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—5098119A0330000
    5/8"
    		0.688"1.312"0.122" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—2598119A0350000
    3/4"
    		0.812"1.469"0.122" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—2598119A0360000
    7/8"
    		0.938"1.750"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—1098119A0370000
    1"
    		1.062"2.000"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—1098119A0380000
    1 1/8"
    		1.188"2.250"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—1098119A04100000
    1 1/4"
    		1.375"2.500"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASME B18.21.1, ASTM F436 Type 1—1098119A04400000
    1 3/8"
    		1.531"2.750"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—1098119A12100000
    1 1/2"
    		1.625"3.000"0.136" to 0.177"ASTM Grade A325, ASTM Grade A490ASME B18.21.1, ASTM F436 Type 1—598119A1110000
    1 5/8"
    		1.770"3.250"0.178" to 0.280"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—598119A12200000
    1 3/4"
    		1.875"3.375"0.178" to 0.280"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—598119A11200000
    1 7/8"
    		2.000"3.500"0.178" to 0.280"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—198119A1230000
    2"
    		2.125"3.750"0.178" to 0.280"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—198119A1130000
    2 1/4"
    		2.407"4.000"0.240" to 0.340"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—198119A1240000
    2 1/2"
    		2.657"4.500"0.240" to 0.340"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—198119A1140000
    2 3/4"
    		2.907"5.000"0.240" to 0.340"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—198119A1250000
    3"
    		3.157"5.500"0.240" to 0.340"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1—198119A11500000
     
    Highly Corrosion-Resistant Zinc-Flake-Coated Steel
    1/2"
    		0.531"1.062"0.097" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1Material Certificate
    		10091806A12100000
    5/8"
    		0.688"1.312"0.122" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1Material Certificate
    		5091806A12200000
    3/4"
    		0.812"1.469"0.122" to 0.177"ASTM Grade A325, ASTM Grade A490ASTM F436 Type 1Material Certificate
    		2591806A12300000
     

    Tension-Indicating Structural Washers

    Fasten structural screws and nuts securely without overtightening. When you see orange dye, you'll know you've applied the correct tension, so you don't accidentally strip threads. These washers distribute pressure under fasteners in columns, joists, and I-beams. They are tested and certified to meet industry standards for handling high-stress loads.
    Steel
    Image of Product. Front orientation. Washers. Tension-Indicating Structural Washers.
    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.
    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.
    Steel
    1/2"
    		0.520"1.073"0.104" to 0.111"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325591358A00500000
    5/8"
    		0.657"1.323"0.126" to 0.133"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325591358A0100000
    7/8"
    		0.915"1.760"0.142" to 0.149"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325591358A02000000
    1"
    		1.045"2.010"0.158" to 0.165"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325591358A02500000
     
    Corrosion-Resistant Galvanized Steel
    1/2"
    		0.520"1.073"0.104" to 0.180"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325595318A1110000
    5/8"
    		0.657"1.323"0.126" to 0.220"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325595318A1120000
    3/4"
    		0.785"1.478"0.142" to 0.230"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325595318A11300000
    7/8"
    		0.915"1.760"0.158" to 0.240"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325195318A1140000
    1"
    		1.045"2.010"0.158" to 0.270"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325195318A1150000
    1 1/8"
    		1.155"2.260"0.158" to 0.270"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325195318A1160000
    1 1/4"
    		1.310"2.510"0.158" to 0.270"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325195318A1170000
    1 3/8"
    		1.442"2.760"0.158" to 0.270"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325195318A1180000
    1 1/2"
    		1.570"3.010"0.158" to 0.270"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325195318A1190000
     
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