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5/8-24 TPI Filter Cap (Stainless steel)

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  • 5/8"-24 Threads per inch muzzle end filter cap.
These parts are for Wix 24003 / Napa 4003 filters only and may not fit Chinese after market filter tubes.
  • These parts are for Wix 24003 / Napa 4003 filters only and may not fit Chinese after market filter tubes.
  • These parts are for Wix 24003 / Napa 4003 filters only and may not fit Chinese after market filter tubes.
Twin Tech Tactical
RRP: $35.35
$30.70 (You save $4.65)

 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. They are made form 416 Stainless Steel, use the same o-rings and are much more corrosion resistant and durable than the original aluminum caps. Weight 6.7oz. (190grams)

You can choose from (½-28), (5/8-24), (13/16-16) caps for the muzzle end of your solvent trap, and 1/8”or ¼” female pipe threads for the drain end of your solvent trap. You can also purchase a solid cap with no hole if you don’t need a drain.

These caps are for Wix 24003 / Napa 4003 filter tubes only and may not fit  metric Chinese after market filter tubes.  




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


    Posted by Paul on Sep 25th 2018

    This end cap will take use and abuse without a blink. A little heavy, due to the size, but no regrets. For people who don't trust aluminum.

  2. Precision & Quality

    Posted by Dwayne on May 4th 2018

    I am very pleased with the quality and workmanship of this product. You will not be disappointed.

  3. Beautiful work!

    Posted by Unknown on Mar 26th 2018

    I bought the 5/8x24 and 13/16x16 and both were machined beautifully!
    Fits the filter nice and snug. Would by from them again in the future!

  4. Excellent

    Posted by Michael D Richardson on Feb 4th 2018

    Great fit and finisg

  5. Perfect fit

    Posted by kirkschlup@outlook.com on Feb 2nd 2018

    FIt perfectly on barrel and filter.

  6. Very well made.

    Posted by Unknown on Aug 29th 2017

    Exactly as advertised and works great.

  7. Very nice product

    Posted by Will Carter on Jun 21st 2017

    Nice machine work, fits perfect. Couldn't ask for a better product.

  8. Great quality

    Posted by Dave on May 15th 2017

    Great quality , and the shipping was processed so quickly I really didnt expect it so quick !!!! Worked great too!!

  9. Great product and service

    Posted by Jim on Aug 10th 2016

    I actually ordered the wrong part and these people corrected it for mme. Product and service were great and shipping was timely.

  10. Excellant fit

    Posted by Derf on Sep 18th 2015

    Nice machining only would be better if it was available in titanium

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