Battery Vent Cap Adapter, Model M27x3-SIA


Adapter Features:

  • Converts M27-3 threaded hole to accept 1/4-turn bayonet caps
  • Adapts #4000600 level indicator to fit threaded battery hole
  • Screw-in style with rubber seal (included)
  • Made in the USA in our Ohio factory

To buy this battery vent cap adapter, enter a quantity in the drop-down box below and select the Add to cart button. Then select the Checkout button that appears at the top left.

Quantity discounts are available for 250 or more. Contact us for details.

PayPal seal

SKU: M27x3-SIA Category:


This battery vent adapter was originally designed to retrofit our #4000600 Battery Water Level Indicator to a Varta RL 840 battery (manufactured by Enersys). Our adapter will also fit any battery that has a vent hole with M27-3 threads. In addition, this adapter enables you to adapt any quarter-turn bayonet-style vent cap to your battery.

We manufacture other battery vent adapters which can be viewed by selecting one of the links below.
Battery Vent Adapter #4D-8D-PIA
Battery Vent Adapter #4D-8D-SIA
Battery Vent Adapter #1050VCA
Battery Vent Adapter #M22X1.5

Additional information

Weight .02 lbs
Dimensions 1.37 × 1.37 × .86 in

You may also like…