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    42 Products

    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.
    External Tooth
    Image of Product. Front orientation. Lock Washers. Tooth Washer, External Tooth.
    Teeth on the outside edge bite into both the fastener and the mating surface for a stronger hold than internal-tooth lock washers. However, they may mar your material and snag on objects. Pair these washers with nuts and screws that are large enough to make contact with the teeth, such as pan, button, and binding head screws.
    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.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Highly Corrosion-Resistant Phosphor Bronze
    No. 3
    		0.102"0.235"0.010" to 0.016"ASME B18.21.110092164A33300000
    No. 4
    		0.115"0.260"0.012" to 0.018"ASME B18.21.110092164A0050000
    No. 6
    		0.141"0.320"0.016" to 0.022"ASME B18.21.110092164A0070000
    No. 8
    		0.168"0.381"0.018" to 0.023"ASME B18.21.110092164A0090000
    No. 10
    		0.195"0.410"0.018" to 0.024"ASME B18.21.110092164A0110000
    No. 12
    		0.221"0.475"0.020" to 0.027"ASME B18.21.110092164A3340000
    1/4"
    		0.256"0.510"0.023" to 0.028"ASME B18.21.110092164A02900000
    5/16"
    		0.320"0.610"0.028" to 0.034"ASME B18.21.15092164A0300000
    3/8"
    		0.384"0.694"0.032" to 0.040"ASME B18.21.12592164A0310000
    7/16"
    		0.448"0.760"0.032" to 0.040"ASME B18.21.12592164A0320000
    1/2"
    		0.513"0.900"0.037" to 0.045"ASME B18.21.12592164A03300000
    5/8"
    		0.641"1.070"0.042" to 0.050"ASME B18.21.11092164A04000000
    3/4"
    		0.768"1.260"0.047" to 0.055"ASME B18.21.1592164A3350000
     
    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.
    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.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Highly Corrosion-Resistant Phosphor Bronze
    No. 2
    		0.089"0.200"0.010" to 0.016"ASME B18.21.110092165A00200000
    No. 3
    		0.109"0.232"0.010" to 0.016"ASME B18.21.110092165A1210000
    No. 4
    		0.115"0.270"0.012" to 0.018"ASME B18.21.110092165A0050000
    No. 5
    		0.136"0.280"0.014" to 0.018"ASME B18.21.110092165A1220000
    No. 6
    		0.141"0.295"0.016" to 0.022"ASME B18.21.110092165A0070000
    No. 8
    		0.168"0.340"0.018" to 0.023"ASME B18.21.110092165A0090000
    No. 10
    		0.195"0.381"0.018" to 0.024"ASME B18.21.110092165A0110000
    No. 12
    		0.231"0.410"0.020" to 0.027"ASME B18.21.110092165A1230000
    1/4"
    		0.256"0.478"0.023" to 0.028"ASME B18.21.110092165A02900000
    5/16"
    		0.320"0.610"0.028" to 0.034"ASME B18.21.15092165A0300000
    3/8"
    		0.384"0.692"0.032" to 0.040"ASME B18.21.15092165A03100000
    7/16"
    		0.448"0.789"0.032" to 0.040"ASME B18.21.12592165A0320000
    1/2"
    		0.512"0.900"0.037" to 0.045"ASME B18.21.12592165A03300000
    5/8"
    		0.640"1.071"0.042" to 0.050"ASME B18.21.1592165A0550000
    3/4"
    		0.795"1.245"0.047" to 0.055"ASME B18.21.1592165A1240000
     

    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.
    External Tooth
    Image of Product. Bottom orientation. Lock Washers. Mil. Spec., Tooth Washer, External Tooth.
    Teeth on the outside edge bite into both the fastener and the mating surface for a stronger hold than internal-tooth lock washers. However, they may mar your material and snag on objects. Pair these washers with nuts and screws that are large enough to make contact with the teeth, such as pan, button, and binding head screws.
    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.
    Highly Corrosion-Resistant Phosphor Bronze
    No. 10
    		0.195"0.410"0.020" to 0.025"MS35335-88ASME B18.21.12597775A53400000
    1/4"
    		0.256"0.510"0.023" to 0.028"MS35335-89ASME B18.21.11097775A5350000
    5/16"
    		0.320"0.610"0.028" to 0.034"MS35335-90ASME B18.21.11097775A5360000
    3/8"
    		0.384"0.694"0.032" to 0.040"MS35335-91ASME B18.21.11097775A5370000
    1/2"
    		0.513"0.900"0.037" to 0.045"MS35335-93ASME B18.21.11097775A5380000
     
    Internal Tooth
    Image of Product. Front orientation. Lock Washers. Mil. Spec., 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.
    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.
    Highly Corrosion-Resistant Phosphor Bronze
    No. 2
    		0.089"0.200"0.010" to 0.015"MS35333-103ASME B18.21.1, NASM353332596551A34000000
    No. 4
    		0.115"0.270"0.015" to 0.019"MS35333-104ASME B18.21.1, NASM353332596551A3500000
    No. 6
    		0.141"0.295"0.017" to 0.021"MS35333-105ASME B18.21.1, NASM353332596551A36000000
    No. 8
    		0.168"0.340"0.018" to 0.023"MS35333-106ASME B18.21.1, NASM353332596551A37000000
    No. 10
    		0.195"0.381"0.020" to 0.025"MS35333-107ASME B18.21.1, NASM353332596551A38000000
    1/4"
    		0.256"0.478"0.023" to 0.028"MS35333-108ASME B18.21.1, NASM353332596551A39000000
    5/16"
    		0.332"0.610"0.028" to 0.034"MS35333-109ASME B18.21.1, NASM353331096551A4000000
    3/8"
    		0.384"0.692"0.032" to 0.040"MS35333-110ASME B18.21.1, NASM353331096551A4100000
    1/2"
    		0.512"0.900"0.037" to 0.045"MS35333-113ASME B18.21.1, NASM35333596551A4200000
     
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