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    37 Products

    Mil. Spec. Tooth Lock Washers

    These washers are manufactured and tested to strict U.S. military standards for material and construction. They resist vibration better 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, Mil. Spec., 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.
    Wear-Resistant 410 Stainless Steel—These grip hard material better than other types of stainless steel. They are not as corrosion resistant as 18-8 and 316 stainless steel, so they are best for environments that experience occasional moisture.
    Corrosion-Resistant Cadmium-Plated Steel—The finish creates a better barrier against rust than zinc plating for use in wet and outdoor environments.
    Highly-Corrosion-Resistant Phosphor Bronze—Stronger and more wear resistant than silicon bronze, but with the same excellent corrosion resistance. These washers won't rust or deteriorate when submerged in salt water, so they're a good fit for marine environments.
    For Screw
    Size
    ID
    OD
    Thk.
    Mil. Spec.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Wear-Resistant 410 Stainless Steel
    No. 2
    		0.089"0.200"0.010" to 0.015"MS35333-69ASME B18.21.1, NASM353332500000000000000
    No. 4
    		0.115"0.270"0.015" to 0.019"MS35333-70ASME B18.21.1, NASM353332500000000000000
    No. 6
    		0.141"0.295"0.017" to 0.021"MS35333-71ASME B18.21.1, NASM353332500000000000000
    No. 8
    		0.168"0.340"0.018" to 0.023"MS35333-72ASME B18.21.1, NASM353332500000000000000
    No. 10
    		0.195"0.381"0.020" to 0.025"MS35333-73ASME B18.21.1, NASM353332500000000000000
    1/4"
    		0.256"0.478"0.023" to 0.028"MS35333-74ASME B18.21.1, NASM353332500000000000000
    5/16"
    		0.332"0.610"0.028" to 0.034"MS35333-75ASME B18.21.1, NASM35333250000000000000
    3/8"
    		0.384"0.692"0.032" to 0.040"MS35333-76ASME B18.21.1, NASM353332500000000000000
    7/16"
    		0.448"0.789"0.032" to 0.040"MS35333-77ASME B18.21.1, NASM353332500000000000000
    1/2"
    		0.512"0.900"0.037" to 0.045"MS35333-78ASME B18.21.1, NASM353331000000000000000
    5/8"
    		0.640"1.071"0.042" to 0.050"MS35333-80ASME B18.21.1, NASM353331000000000000000
    3/4"
    		0.769"1.245"0.047" to 0.055"MS35333-81ASME B18.21.1, NASM35333500000000000000
    7/8"
    		0.894"1.410"0.052" to 0.060"MS35333-82ASME B18.21.1, NASM35333500000000000000
     
    Corrosion-Resistant Cadmium-Plated Steel
    No. 2
    		0.089"0.200"0.010" to 0.015"MS35333-35ASME B18.21.1, NASM35333250000000000000
    No. 4
    		0.115"0.270"0.015" to 0.019"MS35333-36ASME B18.21.1, NASM35333250000000000000
    No. 6
    		0.141"0.295"0.017" to 0.021"MS35333-37ASME B18.21.1, NASM35333250000000000000
    No. 8
    		0.168"0.340"0.018" to 0.023"MS35333-38ASME B18.21.1, NASM35333250000000000000
    No. 10
    		0.195"0.381"0.020" to 0.025"MS35333-39ASME B18.21.1, NASM35333250000000000000
    1/4"
    		0.256"0.478"0.023" to 0.028"MS35333-40ASME B18.21.1, NASM35333250000000000000
    5/16"
    		0.332"0.610"0.028" to 0.034"MS35333-41ASME B18.21.1, NASM35333250000000000000
    3/8"
    		0.384"0.692"0.032" to 0.040"MS35333-42ASME B18.21.1, NASM353332500000000000000
    7/16"
    		0.448"0.789"0.032" to 0.040"MS35333-43ASME B18.21.1, NASM353332500000000000000
    1/2"
    		0.512"0.900"0.037" to 0.045"MS35333-44ASME B18.21.1, NASM353332500000000000000
    5/8"
    		0.640"1.071"0.042" to 0.050"MS35333-46ASME B18.21.1, NASM35333100000000000000
    3/4"
    		0.769"1.245"0.047" to 0.055"MS35333-47ASME B18.21.1, NASM35333100000000000000
    7/8"
    		0.894"1.410"0.052" to 0.060"MS35333-48ASME B18.21.1, NASM353331000000000000000
    1"
    		1.019"1.637"0.059" to 0.067"MS35333-49ASME B18.21.1, NASM3533350000000000000
    1 1/4"
    		1.260"1.950"0.059" to 0.067"MS35333-51ASME B18.21.1, NASM3533350000000000000
     
    Highly-Corrosion-Resistant Phosphor Bronze
    No. 2
    		0.089"0.200"0.010" to 0.015"MS35333-103ASME B18.21.1, NASM35333250000000000000
    No. 4
    		0.115"0.270"0.015" to 0.019"MS35333-104ASME B18.21.1, NASM35333250000000000000
    No. 6
    		0.141"0.295"0.017" to 0.021"MS35333-105ASME B18.21.1, NASM353332500000000000000
    No. 8
    		0.168"0.340"0.018" to 0.023"MS35333-106ASME B18.21.1, NASM353332500000000000000
    No. 10
    		0.195"0.381"0.020" to 0.025"MS35333-107ASME B18.21.1, NASM353332500000000000000
    1/4"
    		0.256"0.478"0.023" to 0.028"MS35333-108ASME B18.21.1, NASM353332500000000000000
    5/16"
    		0.332"0.610"0.028" to 0.034"MS35333-109ASME B18.21.1, NASM35333100000000000000
    3/8"
    		0.384"0.692"0.032" to 0.040"MS35333-110ASME B18.21.1, NASM35333100000000000000
    1/2"
    		0.512"0.900"0.037" to 0.045"MS35333-113ASME B18.21.1, NASM3533350000000000000
     
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