McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    21 Products

    Sealing Washers

    Prevent leaks while distributing weight evenly under nuts and screws. These washers compress as you tighten to keep air and fluid in, and dust and contaminants out. Use them anywhere you need a tight seal, such as protecting electronics from moisture or keeping lubricants contained in machinery.
    Rubber
    Image of Product. Front orientation. Sealing Washers. Rubber.
    Resist leaks better than metal sealing washers, but are more susceptible to wear and tear. Reuse these washers a handful of times, as long as the material isn't damaged.
    Oil-Resistant Aramid-Reinforced Buna-N—These washers are embedded with aramid, which is the same material used in bulletproof vests. This addition makes them stronger and more heat resistant than standard Buna-N washers for a longer lifespan. They won't degrade when exposed to oil, grease, and fuel.
    Temp.
    Range, ° F
    For Screw
    Size
    ID
    OD
    Thk.
    Min.
    Max.
    Color
    Pkg.
    Qty.
    Pkg.
    Oil-Resistant Aramid-Reinforced Buna-N
    No. 4
    0.125"0.375"0.026" to 0.036"0450Green5093303A121000000
    No. 6
    0.156"0.438"0.026" to 0.036"0450Green5093303A12200000
    No. 8
    0.188"0.500"0.026" to 0.036"0450Green5093303A12300000
    No. 10
    0.203"0.750"0.021" to 0.041"0450Green5093303A12400000
    1/4"
    0.250"0.500"0.054" to 0.070"-20460Green1093303A10100000
    1/4"
    0.250"0.625"0.054" to 0.070"-20460Green1093303A10200000
    5/16"
    0.312"0.625"0.054" to 0.070"-20460Green1093303A10300000
    5/16"
    0.312"0.750"0.054" to 0.070"-20460Green1093303A10400000
    3/8"
    0.375"0.625"0.054" to 0.070"-20460Green1093303A10500000
    3/8"
    0.375"0.750"0.054" to 0.070"-20460Green1093303A10600000
    7/16"
    0.469"1.125"0.052" to 0.072"0450Green2593303A12500000
    1/2"
    0.500"0.875"0.054" to 0.070"-20460Green593303A1070000
    1/2"
    0.500"1.000"0.054" to 0.070"-20460Green593303A10800000
    5/8"
    0.625"1.000"0.054" to 0.070"-20460Green593303A10900000
    5/8"
    0.625"1.500"0.054" to 0.070"-20460Green593303A11000000
    3/4"
    0.750"1.500"0.054" to 0.070"-20460Green593303A11100000
    3/4"
    0.750"2.000"0.054" to 0.070"-20460Green593303A11200000
    7/8"
    0.938"2.250"0.115" to 0.135"0450Green593303A12600000
    1"
    1.000"1.500"0.054" to 0.070"-20460Green593303A11300000
    1"
    1.000"2.000"0.054" to 0.070"-20460Green593303A11400000
    1 1/4"
    1.312"3.000"0.115" to 0.135"0450Green193303A1270000
     
    back to top