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    26 Products

    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.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    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.
    Zinc-Plated Steel
    1/2"
    		0.520"1.073"0.104" to 0.180"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490595348A11100000
    5/8"
    		0.657"1.323"0.126" to 0.220"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490595348A11200000
    3/4"
    		0.785"1.478"0.126" to 0.240"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490595348A11300000
    7/8"
    		0.915"1.760"0.142" to 0.260"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490195348A1140000
    1"
    		1.045"2.010"0.158" to 0.270"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490195348A1150000
    1 1/8"
    		1.155"2.260"0.158" to 0.280"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490195348A1160000
    1 1/4"
    		1.310"2.510"0.158" to 0.280"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490195348A1170000
    1 1/2"
    		1.570"3.010"0.158" to 0.280"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490195348A1190000
     
    Steel
    1/2"
    		0.520"1.073"0.104" to 0.111"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325591358A0050000
    1/2"
    		0.520"1.073"0.104" to 0.180"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490591358A5010000
    5/8"
    		0.657"1.323"0.126" to 0.133"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325591358A0100000
    5/8"
    		0.657"1.323"0.126" to 0.220"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490591358A5020000
    3/4"
    		0.785"1.478"0.142" to 0.240"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490591358A5030000
    7/8"
    		0.915"1.760"0.142" to 0.149"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325591358A02000000
    7/8"
    		0.915"1.760"0.158" to 0.260"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490591358A50400000
    1"
    		1.045"2.010"0.158" to 0.165"ASTM Grade A325ASME B18.2.6, ASTM F959 Type A325591358A02500000
    1"
    		1.045"2.010"0.158" to 0.270"ASTM Grade A490
    		ASME B18.2.6, ASTM F959 Type A490591358A50500000
     
    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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