Battery Cap Washer


The perfect replacement for your worn-out battery cap rubber washers. This rubber gasket will fit all quarter-turn bayonet battery caps including speed vent caps. Our rubber washers will fit all our battery caps except for parts #2075, #2085, & #5000 (those models use O-ring seals instead of rubber gaskets). This rubber washer is already included when you buy any of our vent caps and does not need to be ordered separately.

Our high-performance rubber washers are made of genuine Santoprene rubber for extra-long life. This rubber gasket is not harmed by battery acid and will remain highly flexible to provide lasting sealing properties. We have used the same rubber washers on our forklift batteries for years, and we virtually never need to replace them. In our experience, these rubber washers will last the lifetime of the battery cap itself.

To make sure they will fit your vent cap, please measure your existing washer, and compare it with the dimensions of our rubber washers that are listed below.

This rubber washer is available in 3 thicknesses. Our #1050W rubber washer is .064″ thick and is the most common size. This rubber washer comes standard on all our battery vent caps that have a washer type seal. Our #1050W1 rubber washer is .075″ thick and is used only if the standard washer is not quite thick enough to provide a good seal. Our #1050W2 rubber washer is .110″ thick and is used in rare cases where the other rubber washers are not thick enough to provide a good seal.


  • Fits all quarter-turn bayonet-style battery caps
  • Dimensions: 1.380″ O.D. x .946″ I.D.
  • Acid-proof

The minimum order is 25 washers. To buy, choose a washer thickness in the drop-down box below. Then enter the quantity and select the Add to cart button. Then select the Checkout button that appears at the top left.

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Additional information

Weight .002 lbs
Dimensions 1.38 × 1.38 × .064 in

.064" (Standard Rubber Washer), .075" (Thicker Rubber Washer), .110" (Thickest Rubber Washer)

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