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1/8 NPT Drain end Filter Cap (Aluminum)

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  • These caps are drilled thru .339" and threaded with 1/8" female pipe threads.
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Twin Tech Tactical

 Product Description


These WIX 24003 / NAPA 4003 filter caps allow you to attach a WIX / NAPA filter assembly directly to your muzzle thread without the use of an adapter. 

The center hole of the 1/8-NPT cap is drilled thru to .339" diameter and threaded with female 1/8" National pipe threads so you can attach a 1/8" pipe plug or valve with 1/8" NPT thread.

You can also purchase a solid cap with no hole in the center if you don’t need a drain.





BUYER UNDERSTANDS THAT THESE PARTS ARE NOT SUPPRESSORS AND OR SILENCER PARTS IN ANY WAY SHAPE OR FORM.  Buyer fully understands that they waive their rights to ANY claims against Twin Tech Tactical for ANYTHING. These parts are sold for the intended purpose of cleaning firearms and solvent storage ONLY! In other words Twin Tech Tactical is not responsible for how these parts are used or modified after you receive them. Any modification to, or misuse of our parts is the sole responsibility of the purchaser. Twin Tech Tactical and its employees are not responsible for the actions of their customers or the manner in which they use our parts and will NOT accept any liability in any way morally, legally, or financially. These parts are legal to posses and use as sold, and we assume and expect that all of our products purchased by you are used for their intended purposes only and discourage any modification or misuse of any kind.

By purchasing our products you agree to the Terms of this website.

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 Product Reviews

  1. Very nice product

    Posted by Will Carter on May 9th 2017

    Very high quality end caps. Aluminum holds up just fine.

  2. Not only looks AWESOME it functions perfectly!!

    Posted by -Cam on Apr 20th 2017

    I was a little skeptical at first, but as soon as I received the product I was blown away with the quality.

    Match this with the cup filter holders and clean away!! You can drain it straight into the disposal container! NO MESS!!!

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