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    8 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.
    Extra-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.
    Sleeve
    Temp.
    Range
    For Screw
    Size
    Ht.
    OD
    ID
    OD
    Thk.
    Overall
    Ht.
    Min.
    Max.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    Extra-High-Temperature Ceramic
    No. 8
    		0.250"0.406"0.175"0.625"0.218"0.468"Not Rated1,700Off-White5000000000000000
    No. 10
    		0.250"0.468"0.200"0.750"0.218"0.468"Not Rated1,700Off-White500000000000000
     

    Split Lock Washers for Socket Head Screws

    Image of Product. Front orientation. Lock Washers. Split-Lock Washer, For Socket Head Screws.
    Stop socket head screws from loosening due to mild vibration. These washers have a small diameter to fit under screws with narrow heads, but are still thick enough to keep fasteners secure. While they're not as vibration resistant as other lock washers, they are a great fit for electrical panels, light fixtures, and other light duty assemblies. Split lock washers are not reusable, and they only work with fasteners that have right-hand threads. Also known as high-collar lock washers.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these washers won't rust when exposed to moisture. However, they can't hold up to the harsh chemicals that 316 stainless steel can.
    Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these washers have a dark, matte coating to create a finished look. They won't rust in wet and outdoor environments, but can't hold up to harsh chemicals as well as 316 stainless steel.
    Highly-Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these washers won't degrade when exposed to harsh weather, salt water, and most chemicals.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Black-Oxide Steel—Typically chosen for their appearance, these washers have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Steel—Best for dry environments since moisture will cause these washers to rust.
    For Screw
    Size
    ID
    OD
    Thk.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    3/4"
    		0.766"1.105"0.218"ASME B18.21.110000000000000000
     
    Black-Oxide 18-8 Stainless Steel
    3/4"
    		0.766"1.105"0.218"ASME B18.21.110000000000000
     
    Highly-Corrosion-Resistant 316 Stainless Steel
    3/4"
    		0.766"1.105"0.218"ASME B18.21.150000000000000
     
    Zinc-Plated Steel
    3/4"
    		0.766"1.105"0.218"ASME B18.21.1100000000000000
     
    Black-Oxide Steel
    3/4"
    		0.766"1.105"0.218"ASME B18.21.150000000000000
     
    Steel
    3/4"
    		0.766"1.105"0.218"ASME B18.21.1250000000000000
     
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