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    267 Products

    Insulating Sleeve Washers

    Cover screw threads to stop electrical current in its tracks and prevent short circuits. These washers create a barrier between the screw threads and the mating surface when mounted in through holes. This barrier also extends the life of your assembly by preventing galvanic corrosion, which is when two different metals rust more quickly due to contact with each other.
    Flat Edge
    Image of Product. Front orientation. Insulating Washers. Insulating Sleeve Washers, Flat Edge.
    The flat edge distributes weight evenly to take pressure off screw heads.
    Nylon—Our most versatile insulating washers, these block unwanted current in everything from switches and circuit breakers to control panels and electric motors.
    Ultra-Chemical-Resistant PTFE—These washers insulate better than nylon and withstand higher temperatures, so they're a great choice for high-voltage equipment, such as capacitators, transformers, and semiconductors. They resist harsh acids, bases, solvents, and corrosive cleaners.
    Very-High-Temperature Ceramic—Our most heat-resistant washers and the best electrical insulators. These won't melt or become brittle at blistering temperatures up to 1,700° F, making them perfect for ovens, kilns, and furnaces. Ceramic may crack or dent if subjected to hard bumps, however, so these washers are not recommended for high-vibration applications.
    Hard Fiber—The least likely to scratch or mar delicate mounting surfaces, such as printed circuit boards. These washers provide a moderate amount of electrical insulation, but they don't block current as well as plastic or ceramic washers.
    Sleeve
    Temp.
    Range, ° F
    For Screw
    Size
    Ht.
    OD
    ID
    OD
    Thk.
    Overall
    Ht.
    Min.
    Max.
    Color
    Pkg.
    Qty.
    Pkg.
    Nylon
    No. 2
    0.040"0.156"0.093"0.250"0.040"0.080"-40180Black100000000000000000
    No. 2
    0.040"0.156"0.093"0.250"0.040"0.080"-40180Off-White10000000000000000
    No. 2
    0.125"0.120"0.090"0.181"0.047"0.172"-40180Off-White10000000000000000
    No. 2
    0.250"0.120"0.090"0.181"0.047"0.297"-40180Off-White10000000000000000
    No. 2
    0.375"0.120"0.090"0.181"0.047"0.422"-40180Off-White10000000000000000
    No. 4
    0.040"0.187"0.122"0.281"0.040"0.080"-40180Black10000000000000000
    No. 4
    0.040"0.187"0.122"0.281"0.040"0.080"-40180Off-White10000000000000000
    No. 4
    0.047"0.145"0.115"0.235"0.047"0.094"-40180Off-White10000000000000000
    No. 4
    0.052"0.136"0.120"0.253"0.047"0.099"-40180Off-White10000000000000000
    No. 4
    0.062"0.143"0.115"0.250"0.031"0.093"-40180Off-White10000000000000000
    No. 4
    0.063"0.145"0.115"0.235"0.047"0.110"-40180Off-White10000000000000000
    No. 4
    0.125"0.139"0.118"0.250"0.046"0.171"-40180Off-White10000000000000000
    No. 4
    0.125"0.140"0.115"0.242"0.046"0.171"-40180Off-White10000000000000000
    No. 4
    0.125"0.145"0.115"0.235"0.047"0.172"-40180Off-White10000000000000000
    No. 4
    0.250"0.145"0.115"0.235"0.047"0.297"-40180Off-White10000000000000000
    No. 4
    0.312"0.185"0.125"0.312"0.058"0.370"-40180Off-White10000000000000000
    No. 4
    0.375"0.145"0.115"0.235"0.047"0.422"-40180Off-White10000000000000000
    No. 4
    0.500"0.145"0.115"0.235"0.047"0.547"-40180Off-White10000000000000000
    No. 6
    0.031"0.187"0.140"0.250"0.062"0.093"-40180Off-White10000000000000000
    No. 6
    0.040"0.218"0.146"0.328"0.040"0.080"-40180Black10000000000000000
    No. 6
    0.040"0.218"0.146"0.328"0.040"0.080"-40180Off-White10000000000000000
    No. 6
    0.047"0.170"0.140"0.290"0.047"0.094"-40180Off-White10000000000000000
    No. 6
    0.063"0.170"0.140"0.290"0.047"0.110"-40180Off-White10000000000000000
    No. 6
    0.125"0.170"0.140"0.290"0.047"0.172"-40180Off-White10000000000000000
    No. 6
    0.188"0.170"0.140"0.290"0.047"0.235"-40180Off-White10000000000000000
    No. 6
    0.250"0.170"0.140"0.290"0.047"0.297"-40180Off-White10000000000000000
    No. 6
    0.375"0.170"0.140"0.290"0.047"0.422"-40180Off-White10000000000000000
    No. 6
    0.500"0.170"0.140"0.290"0.047"0.547"-40180Off-White10000000000000000
    No. 8
    0.046"0.250"0.171"0.375"0.040"0.086"-40180Off-White10000000000000000
    No. 8
    0.047"0.209"0.171"0.345"0.062"0.109"-40180Off-White10000000000000000
    No. 8
    0.050"0.250"0.174"0.375"0.050"0.100"-40180Black10000000000000000
    No. 8
    0.050"0.250"0.174"0.375"0.050"0.100"-40180Off-White10000000000000000
    No. 8
    0.125"0.205"0.173"0.344"0.063"0.188"-40180Off-White10000000000000000
    No. 8
    0.141"0.205"0.173"0.344"0.063"0.204"-40180Off-White10000000000000000
    No. 8
    0.250"0.205"0.173"0.344"0.063"0.313"-40180Off-White10000000000000000
    No. 8
    0.250"0.250"0.171"0.375"0.040"0.290"-40180Off-White10000000000000000
    No. 8
    0.375"0.205"0.173"0.344"0.063"0.438"-40180Off-White10000000000000000
    No. 8
    0.500"0.205"0.173"0.344"0.063"0.563"-40180Off-White10000000000000000
    No. 8
    0.625"0.205"0.173"0.344"0.063"0.688"-40180Off-White10000000000000000
    No. 8
    0.750"0.205"0.173"0.344"0.063"0.813"-40180Off-White10000000000000000
    No. 10
    0.046"0.281"0.201"0.437"0.046"0.092"-40180Off-White10000000000000000
    No. 10
    0.050"0.281"0.201"0.437"0.050"0.100"-40180Black10000000000000000
    No. 10
    0.050"0.281"0.201"0.437"0.050"0.100"-40180Off-White10000000000000000
    No. 10
    0.062"0.308"0.196"0.500"0.063"0.125"-40180Off-White5000000000000000
    No. 10
    0.125"0.312"0.199"0.433"0.063"0.188"-40180Off-White10000000000000000
    No. 10
    0.140"0.245"0.187"0.375"0.031"0.171"-40180Off-White10000000000000000
    No. 10
    0.141"0.260"0.200"0.399"0.063"0.204"-40180Off-White10000000000000000
    No. 10
    0.187"0.240"0.197"0.408"0.062"0.249"-40180Off-White10000000000000000
    No. 10
    0.188"0.260"0.200"0.399"0.063"0.251"-40180Off-White10000000000000000
    No. 10
    0.250"0.260"0.200"0.399"0.063"0.313"-40180Off-White10000000000000000
    No. 10
    0.312"0.312"0.200"0.500"0.062"0.374"-40180Off-White10000000000000000
    No. 10
    0.315"0.310"0.202"0.433"0.079"0.394"-40180Off-White10000000000000000
    No. 10
    0.375"0.260"0.200"0.399"0.063"0.438"-40180Off-White10000000000000000
    No. 10
    0.375"0.312"0.191"0.513"0.062"0.437"-40180Off-White5000000000000000
    No. 10
    0.500"0.260"0.200"0.399"0.063"0.563"-40180Off-White10000000000000000
    No. 10
    0.625"0.260"0.200"0.399"0.063"0.688"-40180Off-White10000000000000000
    No. 10
    0.750"0.260"0.200"0.399"0.063"0.813"-40180Off-White10000000000000000
    No. 12
    0.187"0.240"0.220"0.408"0.062"0.249"-40180Off-White10000000000000000
    No. 12
    0.236"0.315"0.240"0.480"0.079"0.315"-40180Off-White10000000000000000
    1/4"
    0.031"0.312"0.252"0.500"0.031"0.062"-40180Off-White10000000000000000
    1/4"
    0.060"0.375"0.260"0.562"0.060"0.120"-40180Black10000000000000000
    1/4"
    0.060"0.375"0.260"0.562"0.060"0.120"-40180Off-White10000000000000000
    1/4"
    0.062"0.310"0.250"0.425"0.062"0.124"-40180Off-White10000000000000000
    1/4"
    0.078"0.312"0.255"0.464"0.016"0.094"-40180Off-White10000000000000000
    1/4"
    0.093"0.343"0.257"0.505"0.062"0.155"-40180Off-White10000000000000000
    1/4"
    0.094"0.312"0.260"0.505"0.063"0.157"-40180Off-White10000000000000000
    1/4"
    0.125"0.310"0.260"0.450"0.065"0.190"-40180Off-White10000000000000000
    1/4"
    0.125"0.312"0.255"0.467"0.046"0.171"-40180Off-White10000000000000000
    1/4"
    0.125"0.312"0.260"0.513"0.063"0.188"-40180Off-White10000000000000000
    1/4"
    0.125"0.327"0.260"0.630"0.063"0.188"-40180Off-White5000000000000000
    1/4"
    0.125"0.359"0.266"0.697"0.062"0.187"-40180Off-White10000000000000000
    1/4"
    0.125"0.370"0.250"0.600"0.125"0.250"-40180Off-White10000000000000000
    1/4"
    0.140"0.312"0.260"0.515"0.062"0.202"-40180Off-White10000000000000000
    1/4"
    0.170"0.375"0.257"0.500"0.125"0.295"-40180Off-White10000000000000000
    1/4"
    0.187"0.322"0.255"0.625"0.062"0.249"-40180Off-White10000000000000000
    1/4"
    0.187"0.375"0.254"0.630"0.062"0.249"-40180Off-White10000000000000000
    1/4"
    0.188"0.312"0.260"0.513"0.063"0.251"-40180Off-White10000000000000000
    1/4"
    0.250"0.312"0.260"0.513"0.031"0.281"-40180Off-White10000000000000000
    1/4"
    0.250"0.312"0.260"0.513"0.063"0.313"-40180Off-White10000000000000000
    1/4"
    0.375"0.312"0.260"0.513"0.063"0.438"-40180Off-White10000000000000000
    1/4"
    0.375"0.312"0.261"0.513"0.063"0.438"-40180Off-White10000000000000000
    1/4"
    0.437"0.375"0.250"0.500"0.062"0.499"-40180Off-White10000000000000000
    1/4"
    0.437"0.375"0.255"0.563"0.062"0.499"-40180Off-White10000000000000000
    1/4"
    0.500"0.312"0.260"0.513"0.063"0.563"-40180Off-White10000000000000000
    1/4"
    0.625"0.312"0.260"0.513"0.063"0.688"-40180Off-White10000000000000000
    1/4"
    0.750"0.312"0.260"0.513"0.063"0.813"-40180Off-White10000000000000000
    5/16"
    0.046"0.375"0.323"0.750"0.046"0.092"-40180Off-White10000000000000000
    5/16"
    0.125"0.360"0.320"0.620"0.063"0.188"-40180Off-White10000000000000000
    5/16"
    0.139"0.405"0.320"0.625"0.066"0.205"-40180Off-White10000000000000000
    5/16"
    0.250"0.360"0.320"0.625"0.063"0.313"-40180Off-White10000000000000000
    5/16"
    0.375"0.360"0.320"0.620"0.063"0.438"-40180Off-White10000000000000000
    5/16"
    0.395"0.430"0.322"0.740"0.065"0.460"-40180Off-White5000000000000000
    5/16"
    0.500"0.360"0.320"0.620"0.063"0.563"-40180Off-White10000000000000000
    5/16"
    0.625"0.360"0.320"0.620"0.063"0.688"-40180Off-White10000000000000000
    3/8"
    0.060"0.500"0.385"0.750"0.060"0.120"-40180Black10000000000000000
    3/8"
    0.060"0.500"0.385"0.750"0.060"0.120"-40180Off-White10000000000000000
    3/8"
    0.062"0.500"0.375"0.750"0.125"0.187"-40180Off-White10000000000000000
    3/8"
    0.155"0.545"0.391"0.745"0.100"0.255"-40180Off-White2500000000000000
    3/8"
    0.187"0.443"0.375"0.743"0.062"0.249"-40180Off-White5000000000000000
    3/8"
    0.188"0.437"0.376"0.743"0.063"0.251"-40180Off-White10000000000000000
    3/8"
    0.188"0.498"0.378"0.750"0.063"0.251"-40180Off-White10000000000000000
    3/8"
    0.250"0.505"0.378"0.755"0.078"0.328"-40180Off-White10000000000000000
    3/8"
    0.250"0.546"0.406"0.980"0.125"0.375"-40180Off-White5000000000000000
    3/8"
    0.250"0.556"0.380"0.980"0.125"0.375"-40180Off-White5000000000000000
    3/8"
    0.312"0.500"0.380"0.625"0.062"0.374"-40180Off-White10000000000000000
    3/8"
    0.313"0.500"0.395"0.625"0.063"0.376"-40180Off-White10000000000000000
    3/8"
    0.375"0.470"0.385"0.570"0.063"0.438"-40180Off-White10000000000000000
    3/8"
    0.440"0.495"0.390"0.745"0.063"0.503"-40180Off-White5000000000000000
    3/8"
    0.563"0.500"0.382"1.000"0.063"0.626"-40180Off-White5000000000000000
    3/8"
    0.750"0.500"0.375"1.000"0.125"0.875"-40180Off-White100000000000000
    3/8"
    1.000"0.500"0.375"0.875"0.063"1.063"-40180Off-White5000000000000000
    7/16"
    0.375"0.630"0.440"0.875"0.125"0.500"-40180Off-White5000000000000000
    1/2"
    0.094"0.740"0.515"1.125"0.063"0.157"-40180Off-White5000000000000000
    1/2"
    0.187"0.625"0.510"0.750"0.062"0.249"-40180Off-White10000000000000000
    1/2"
    0.250"0.617"0.509"0.750"0.062"0.312"-40180Off-White10000000000000000
    1/2"
    0.250"0.718"0.515"1.125"0.187"0.437"-40180Off-White2500000000000000
    1/2"
    0.281"0.752"0.515"1.105"0.125"0.406"-40180Off-White2500000000000000
    1/2"
    0.312"0.625"0.505"0.750"0.062"0.374"-40180Off-White5000000000000000
    1/2"
    0.313"0.563"0.500"0.745"0.031"0.344"-40180Off-White5000000000000000
    1/2"
    0.330"0.625"0.515"1.000"0.040"0.370"-40180Off-White2500000000000000
    1/2"
    0.375"0.633"0.510"0.875"0.125"0.500"-40180Off-White5000000000000000
    1/2"
    0.406"0.600"0.538"1.252"0.063"0.469"-40180Off-White2500000000000000
    1/2"
    0.437"0.625"0.500"0.750"0.062"0.499"-40180Off-White5000000000000000
    1/2"
    0.437"0.700"0.510"1.125"0.093"0.530"-40180Off-White5000000000000000
    1/2"
    0.500"0.620"0.520"0.825"0.062"0.562"-40180Off-White5000000000000000
    1/2"
    0.619"0.740"0.504"0.995"0.125"0.744"-40180Off-White2500000000000000
    9/16"
    0.203"0.750"0.617"0.880"0.047"0.250"-40180Off-White5000000000000000
    5/8"
    0.120"0.745"0.645"1.000"0.130"0.250"-40180Off-White2500000000000000
    5/8"
    0.500"0.750"0.635"0.875"0.063"0.563"-40180Off-White5000000000000000
    5/8"
    0.500"0.875"0.627"1.245"0.125"0.625"-40180Off-White2500000000000000
    3/4"
    0.313"0.880"0.758"1.130"0.062"0.375"-40180Off-White5000000000000000
    7/8"
    0.344"0.995"0.885"1.250"0.156"0.500"-40180Off-White2500000000000000
    1"
    0.625"1.375"1.015"1.750"0.125"0.750"-40180Off-White1000000000000000
    M2
    3.000 mm3.000 mm2.100 mm4.200 mm1.000 mm4.000 mm-40180Off-White10000000000000000
    M3
    2.000 mm4.000 mm3.100 mm6.200 mm1.000 mm3.000 mm-40180Off-White10000000000000000
    M3
    4.000 mm4.000 mm3.100 mm6.200 mm1.000 mm5.000 mm-40180Off-White10000000000000000
    M3
    8.000 mm4.000 mm3.100 mm6.200 mm1.000 mm9.000 mm-40180Off-White10000000000000000
    M4
    3.000 mm6.000 mm4.100 mm8.400 mm1.500 mm4.500 mm-40180Off-White10000000000000000
    M4
    5.000 mm6.000 mm4.100 mm8.400 mm1.500 mm6.500 mm-40180Off-White10000000000000000
    M5
    3.000 mm7.000 mm5.100 mm10.200 mm2.000 mm5.000 mm-40180Off-White10000000000000000
    M5
    5.000 mm7.000 mm5.100 mm10.200 mm2.000 mm7.000 mm-40180Off-White10000000000000000
    M6
    4.000 mm8.000 mm6.100 mm12.200 mm2.000 mm6.000 mm-40180Off-White10000000000000000
    M6
    10.000 mm8.000 mm6.100 mm12.200 mm2.000 mm12.000 mm-40180Off-White10000000000000000
    M8
    4.000 mm10.000 mm8.100 mm14.200 mm2.500 mm6.500 mm-40180Off-White10000000000000000
    M8
    8.000 mm10.000 mm8.100 mm14.200 mm2.500 mm10.500 mm-40180Off-White10000000000000000
     
    Ultra-Chemical-Resistant PTFE
    No. 2
    0.062"0.125"0.091"0.312"0.063"0.125"Not Rated500White50000000000000
    No. 4
    0.030"0.136"0.115"0.200"0.030"0.060"Not Rated500White50000000000000
    No. 6
    0.039"0.187"0.140"0.312"0.023"0.062"Not Rated500White500000000000000
    No. 8
    0.045"0.265"0.169"0.375"0.049"0.094"Not Rated500White500000000000000
    No. 10
    0.032"0.252"0.193"0.375"0.032"0.064"Not Rated500White500000000000000
    1/4"
    0.045"0.355"0.260"0.545"0.049"0.094"Not Rated500White500000000000000
    3/8"
    0.060"0.500"0.385"0.750"0.060"0.120"Not Rated500White500000000000000
     
    Very-High-Temperature Ceramic
    No. 6
    0.062"0.281"0.150"0.500"0.125"0.187"Not Rated1,700Off-White500000000000000
    No. 6
    0.250"0.281"0.150"0.500"0.187"0.437"Not Rated1,700Off-White500000000000000
    No. 8
    0.062"0.406"0.175"0.625"0.125"0.187"Not Rated1,700Off-White500000000000000
    No. 8
    0.250"0.406"0.175"0.625"0.218"0.468"Not Rated1,700Off-White500000000000000
    No. 10
    0.062"0.468"0.200"0.750"0.156"0.218"Not Rated1,700Off-White500000000000000
    No. 10
    0.250"0.468"0.200"0.750"0.218"0.468"Not Rated1,700Off-White500000000000000
    1/4"
    0.062"0.593"0.265"0.875"0.188"0.250"Not Rated1,700Off-White500000000000000
    1/4"
    0.250"0.593"0.265"0.875"0.250"0.500"Not Rated1,700Off-White500000000000000
    M2
    2.500 mm3.000 mm2.100 mm4.200 mm1.500 mm4.000 mmNot Rated1,700Off-White10000000000000
    M3
    1.500 mm4.000 mm3.100 mm6.200 mm1.500 mm3.000 mmNot Rated1,700Off-White10000000000000
    M3
    3.500 mm4.000 mm3.100 mm6.200 mm1.500 mm5.000 mmNot Rated1,700Off-White10000000000000
    M3
    7.500 mm4.000 mm3.100 mm6.200 mm1.500 mm9.000 mmNot Rated1,700Off-White10000000000000
    M4
    3.000 mm6.000 mm4.100 mm8.400 mm1.500 mm4.500 mmNot Rated1,700Off-White10000000000000
    M4
    5.000 mm6.000 mm4.100 mm8.400 mm1.500 mm6.500 mmNot Rated1,700Off-White10000000000000
    M5
    3.000 mm7.000 mm5.100 mm10.200 mm2.000 mm5.000 mmNot Rated1,700Off-White10000000000000
    M5
    5.000 mm7.000 mm5.100 mm10.200 mm2.000 mm7.000 mmNot Rated1,700Off-White10000000000000
    M6
    4.000 mm8.000 mm6.100 mm12.200 mm2.000 mm6.000 mmNot Rated1,700Off-White10000000000000
    M6
    10.000 mm8.000 mm6.100 mm12.200 mm2.000 mm12.000 mmNot Rated1,700Off-White10000000000000
    M8
    4.000 mm10.000 mm8.100 mm14.200 mm2.500 mm6.500 mmNot Rated1,700Off-White10000000000000
    M8
    8.000 mm10.000 mm8.100 mm14.200 mm2.500 mm10.500 mmNot Rated1,700Off-White10000000000000
     
    Hard Fiber
    No. 2
    0.025"0.154"0.090"0.250"0.030"0.055"Not Rated230Black5000000000000000
    No. 4
    0.025"0.186"0.116"0.250"0.030"0.055"Not Rated230Black5000000000000000
    No. 6
    0.030"0.186"0.142"0.313"0.040"0.070"Not Rated230Black500000000000000
    No. 8
    0.030"0.246"0.168"0.375"0.040"0.070"Not Rated230Black5000000000000000
    No. 10
    0.030"0.312"0.194"0.375"0.040"0.070"Not Rated230Black5000000000000000
    1/4"
    0.030"0.312"0.254"0.500"0.040"0.070"Not Rated230Black5000000000000000
    3/8"
    0.040"0.437"0.380"0.625"0.060"0.100"Not Rated230Black5000000000000000
     
    Rolled Edge for Sealing
    Image of Product. Front orientation. Insulating Washers. Insulating Sleeve Washers, Rolled Edge.
    The rolled edge compresses into the screw threads as you tighten, sealing out dirt, oil, and other contaminants.
    Nylon—Our most versatile insulating washers, these block unwanted current in everything from switches and circuit breakers to control panels and electric motors.
    Sleeve
    Temp.
    Range, ° F
    For Screw
    Size
    Ht.
    OD
    ID
    OD
    Overall
    Ht.
    Min.
    Max.
    Color
    Pkg.
    Qty.
    Pkg.
    Nylon
    No. 2
    0.015"0.112"0.088"0.175"0.065"-40180Off-White2500000000000000
    No. 2
    0.750"0.112"0.088"0.175"0.800"-40180Off-White2500000000000000
    No. 2
    1.000"0.112"0.088"0.175"1.050"-40180Off-White2500000000000000
    No. 4
    0.015"0.140"0.116"0.195"0.080"-40180Off-White250000000000000
    No. 4
    0.125"0.140"0.116"0.195"0.190"-40180Off-White2500000000000000
    No. 6
    0.020"0.172"0.142"0.225"0.095"-40180Off-White250000000000000
    No. 6
    0.125"0.172"0.142"0.225"0.200"-40180Off-White2500000000000000
    No. 6
    1.000"0.172"0.142"0.225"1.075"-40180Off-White2500000000000000
    No. 8
    0.035"0.198"0.168"0.270"0.115"-40180Off-White250000000000000
    No. 8
    0.125"0.198"0.168"0.270"0.205"-40180Off-White2500000000000000
    No. 10
    0.035"0.228"0.194"0.300"0.115"-40180Off-White250000000000000
    No. 10
    0.125"0.228"0.194"0.300"0.205"-40180Off-White2500000000000000
    No. 10
    0.250"0.228"0.194"0.300"0.330"-40180Off-White2500000000000000
    No. 12
    0.025"0.254"0.220"0.330"0.125"-40180Off-White250000000000000
    No. 12
    0.125"0.254"0.220"0.330"0.225"-40180Off-White2500000000000000
    No. 12
    0.250"0.254"0.220"0.330"0.350"-40180Off-White2500000000000000
    No. 12
    1.000"0.254"0.220"0.330"1.100"-40180Off-White2500000000000000
    1/4"
    0.025"0.292"0.252"0.365"0.125"-40180Off-White250000000000000
    1/4"
    0.125"0.292"0.252"0.365"0.225"-40180Off-White2500000000000000
    1/4"
    0.250"0.292"0.252"0.365"0.350"-40180Off-White2500000000000000
    1/4"
    0.500"0.292"0.252"0.365"0.600"-40180Off-White2500000000000000
    1/4"
    1.000"0.292"0.252"0.365"1.100"-40180Off-White2500000000000000
    5/16"
    0.125"0.356"0.316"0.460"0.230"-40180Off-White2500000000000000
    5/16"
    0.250"0.356"0.316"0.460"0.355"-40180Off-White2500000000000000
    5/16"
    0.500"0.356"0.316"0.460"0.605"-40180Off-White2500000000000000
    3/8"
    0.035"0.419"0.379"0.535"0.160"-40180Off-White2500000000000000
    3/8"
    0.125"0.419"0.379"0.535"0.250"-40180Off-White2500000000000000
    3/8"
    0.250"0.419"0.379"0.535"0.375"-40180Off-White2500000000000000
    3/8"
    0.500"0.419"0.379"0.535"0.625"-40180Off-White2500000000000000
    3/8"
    1.000"0.419"0.379"0.535"1.125"-40180Off-White2500000000000000
    7/16"
    0.125"0.486"0.441"0.600"0.260"-40180Off-White2500000000000000
    7/16"
    0.250"0.486"0.441"0.600"0.385"-40180Off-White2500000000000000
    7/16"
    1.000"0.486"0.441"0.600"1.135"-40180Off-White2500000000000000
    1/2"
    0.040"0.548"0.504"0.645"0.195"-40180Off-White2500000000000000
    1/2"
    0.125"0.548"0.504"0.645"0.280"-40180Off-White2500000000000000
    1/2"
    0.250"0.548"0.504"0.645"0.405"-40180Off-White2500000000000000
    1/2"
    0.500"0.548"0.504"0.645"0.655"-40180Off-White2500000000000000
    1/2"
    0.750"0.548"0.504"0.645"0.905"-40180Off-White2500000000000000
    1/2"
    1.000"0.548"0.504"0.645"1.155"-40180Off-White2500000000000000
    5/8"
    0.125"0.679"0.629"0.800"0.285"-40180Off-White2500000000000000
    5/8"
    0.250"0.679"0.630"0.800"0.410"-40180Off-White2500000000000000
    5/8"
    0.500"0.679"0.629"0.800"0.660"-40180Off-White2500000000000000
    5/8"
    0.750"0.679"0.629"0.800"0.910"-40180Off-White2500000000000000
    5/8"
    1.000"0.679"0.629"0.800"1.160"-40180Off-White2500000000000000
    3/4"
    0.125"0.810"0.754"0.935"0.295"-40180Off-White2500000000000000
    3/4"
    0.250"0.810"0.754"0.935"0.420"-40180Off-White2500000000000000
    3/4"
    0.500"0.810"0.754"0.935"0.670"-40180Off-White2500000000000000
    3/4"
    0.750"0.810"0.754"0.935"0.920"-40180Off-White2500000000000000
    3/4"
    1.000"0.810"0.754"0.935"1.170"-40180Off-White2500000000000000
    7/8"
    0.125"0.954"0.879"1.030"0.305"-40180Off-White2500000000000000
    7/8"
    0.250"0.954"0.879"1.030"0.430"-40180Off-White2500000000000000
    7/8"
    1.000"0.954"0.879"1.030"1.180"-40180Off-White2500000000000000
    1"
    0.750"1.075"1.005"1.280"0.935"-40180Off-White2500000000000000
    1"
    1.000"1.075"1.005"1.280"1.185"-40180Off-White2500000000000000
    M2.5
    3.175 mm3.100 mm2.600 mm4.400 mm4.800 mm-40180Off-White2500000000000000
    M3
    3.175 mm3.700 mm3.100 mm5.000 mm4.800 mm-40180Off-White2500000000000000
    M3
    6.300 mm3.700 mm3.100 mm5.000 mm8.000 mm-40180Off-White2500000000000000
    M3
    12.700 mm3.700 mm3.100 mm5.000 mm14.300 mm-40180Off-White2500000000000000
    M4
    3.175 mm4.800 mm4.100 mm6.200 mm5.300 mm-40180Off-White2500000000000000
    M4
    6.300 mm4.800 mm4.100 mm6.200 mm8.400 mm-40180Off-White2500000000000000
    M5
    3.175 mm5.800 mm5.100 mm7.900 mm5.500 mm-40180Off-White2500000000000000
    M5
    12.700 mm5.800 mm5.100 mm7.900 mm15.000 mm-40180Off-White2500000000000000
    M6
    3.175 mm6.900 mm6.100 mm9.000 mm5.800 mm-40180Off-White2500000000000000
    M6
    25.400 mm6.900 mm6.100 mm9.000 mm28.000 mm-40180Off-White2500000000000000
    M8
    3.175 mm9.000 mm8.100 mm12.000 mm5.800 mm-40180Off-White2500000000000000
    M8
    6.300 mm9.000 mm8.100 mm12.000 mm9.000 mm-40180Off-White2500000000000000
    M8
    12.700 mm9.000 mm8.100 mm12.000 mm15.400 mm-40180Off-White2500000000000000
    M8
    19.050 mm9.000 mm8.100 mm12.000 mm21.700 mm-40180Off-White2500000000000000
    M10
    3.175 mm11.000 mm10.100 mm12.900 mm6.100 mm-40180Off-White2500000000000000
    M10
    6.300 mm11.000 mm10.100 mm12.900 mm9.500 mm-40180Off-White2500000000000000
    M10
    12.700 mm11.000 mm10.100 mm12.900 mm15.800 mm-40180Off-White2500000000000000
    M10
    25.400 mm11.000 mm10.100 mm12.900 mm28.500 mm-40180Off-White2500000000000000
    M12
    3.175 mm13.100 mm12.100 mm15.600 mm6.700 mm-40180Off-White2500000000000000
    M12
    12.700 mm13.100 mm12.100 mm15.600 mm16.300 mm-40180Off-White2500000000000000
    M12
    25.400 mm13.100 mm12.100 mm15.600 mm29.000 mm-40180Off-White2500000000000000
    M16
    3.175 mm17.300 mm16.100 mm20.300 mm7.000 mm-40180Off-White2500000000000000
    M16
    19.050 mm17.300 mm16.100 mm20.300 mm23.100 mm-40180Off-White2500000000000000
     

    Insulating Cup Washers

    Image of Product. Front orientation. Insulating Washers. Insulating Cup Washers.
    Cover screw heads or nuts to block electrical current and prevent short circuits. These washers isolate fasteners from sensitive surface-mounted components, such as capacitators and transistors on printed circuit boards. They also extend the life of your assembly by preventing galvanic corrosion, which is when two different metals rust more quickly due to contact with each other.
    Nylon—Our most versatile insulating washers, these block unwanted current in everything from switches and circuit breakers to control panels and electric motors.
    Very-High-Temperature Ceramic—Our most heat-resistant washers and the best electrical insulators. These won't melt or become brittle at blistering temperatures up to 1,700° F, making them perfect for ovens, kilns, and furnaces. Ceramic may crack or dent if subjected to hard bumps, however, so these washers are not recommended for high-vibration applications.
    Temp.
    Range, ° F
    For Screw
    Size
    ID
    OD
    Cup
    ID
    Inside
    Dp.
    Thk.
    Overall
    Ht.
    Min.
    Max.
    Color
    Pkg.
    Qty.
    Pkg.
    Nylon
    No. 4
    0.115"0.305"0.245"0.117"0.040"0.157"-40180Off-White10000000000000000
    No. 6
    0.140"0.360"0.300"0.142"0.040"0.182"-40180Off-White1000000000000000
    No. 8
    0.171"0.414"0.354"0.166"0.040"0.206"-40180Off-White1000000000000000
    No. 10
    0.194"0.470"0.410"0.190"0.040"0.230"-40180Off-White1000000000000000
    1/4"
    0.257"0.595"0.535"0.247"0.042"0.289"-40180Off-White1000000000000000
     
    Very-High-Temperature Ceramic
    No. 4
    0.130"0.440"0.250"0.125"0.100"0.225"Not Rated1,700Off-White10000000000000
    No. 6
    0.160"0.500"0.312"0.150"0.100"0.250"Not Rated1,700Off-White10000000000000
    No. 8
    0.180"0.560"0.375"0.170"0.100"0.270"Not Rated1,700Off-White10000000000000
    No. 10
    0.200"0.625"0.437"0.190"0.100"0.290"Not Rated1,700Off-White10000000000000
    1/4"
    0.260"0.750"0.531"0.250"0.100"0.350"Not Rated1,700Off-White10000000000000
     

    Insulating Sleeve Washer Assortments

    Image of Product. Front orientation. Insulating Washers. Insulating Sleeve Washer Assortments.
    Keep a collection of common sizes on hand to insulate a variety of screws. These washers create a barrier between the screw threads and the mating surface to cut off electrical current and prevent short circuits. They also extend the life of your assembly by preventing galvanic corrosion, which is when two different metals rust more quickly due to contact with each other.
    Nylon—Our most versatile insulating washers, these block unwanted current in everything from switches and circuit breakers to control panels and electric motors.
    No. of
    Pieces
    Sizes Included
    Temp.,
    ° F
    Color
    Container
    Type
    Each
    Nylon
    245For No. 2 to 5/16" Screw Sizes-40 to 185Off-WhitePlastic Box000000000000000
     
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