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13/16"-16 TPI Internal Thread x 1 7/8"-16 O.D. Filter cap (Stainless steel)

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  • 13/16"-16 Threads per inch I.D. thread end cap.
These parts are for 1 7/8"-16 threaded tubes only and will not fit metric tubes.
  • These caps are for Wix 24003, 24744 / Napa 4003, 4744 filters style tubes with 1 7/8"-16 threads only, and may not fit Chinese after market filter tubes.
  • All of our Wix / Napa parts are designed to fit Original Wix / Napa filter tubes style tubes with 1 7/8"-16 threads.
Part numbers, Wix 24003, Wix24744 / Napa 4003, Napa 4744. The filter tube dimensions and threads are identical on all of these part numbers. The only difference is the internal filter micron measurement.
Twin Tech Tactical
RRP: $36.35
$35.35 (You save $1.00)
Current Stock:

 Product Description


These (Twin Tech 24003) , (WIX 24003, 24744, 10429) / (NAPA 4003, 4744, 600429) style filter caps have (1 7/8" x 16 threads per inch O.D. thread) by (13/16" x 16 threads per inch I.D. thread). 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 6.2oz. (176grams)

O-Rings sold separate.


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 Product Reviews

  1. Threaded end cap adapter

    Posted by MGC on Jul 31st 2021

    Well built, smooth machining and finish. Fits perfectly into the filter body. The thread matches very closely to the threaded muzzle device already on the barrel and alignment is perfect.

  2. 13/16 cap

    Posted by Unknown on Sep 21st 2019

    Very well made. It hooks up to the muzzle device I made awesome. I would recommend this to anyone who is looking for a stainless Steel end cap adapter.

  3. Looks Good

    Posted by Unknown on Sep 7th 2019

    Quality part and shipped quickly.

  4. Stainless Napa 4003 to 13/16-16 end cap

    Posted by Unknown on May 24th 2019

    I wish I had found this sooner. The end cap is well made. I would like it more if the threads were a little longer even though there is more than enough for a solid hold. Thank you

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