Thread Adapter - .578 x 28 to 5/8 x 24

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Breek Arms offers a low cost option for thread adapters, which allow you to convert your uncommon barrel thread pattern to something more available on the market. Our .578x28 thread turns your barrel into a very common 5/8x24 thread that is available at most shops. We offer two 45 cal options in 5/8x24. 

Both the flash hider and muzzle brake have outside threads which allows you to quickly detach your own Breek Arms Blast Shield or suppressor.

  • Design: Thread adapter 45 Cal Conversion
  • Female Thread: .578x28 TPI
  • Outside Thread: 5/8x24 TPI
  • Material: Pre Hardened Steel
  • Overall length: 1.26"
  • Weight: 0.9 oz
  • Adds approximately 0.70" inches to the overall length of your barrel

WARNING: Most 5/8x24 threads are for 30 calibers. Please make sure to double check you are using 45 Caliber exit hole when installing this adapter.

4 Reviews Hide Reviews Show Reviews

  • 5
    .578X28 to 5/8X24 adapter

    Posted by Bert Dees on Jan 21st 2021

    Fits perfect, fast delivery, would buy again

  • 5
    Works perfectly

    Posted by Parker Brown on Dec 25th 2020

    Zero complaints! Fits perfectly, works well, and isn't difficult to use at all. The flats on the sides make it easy to use a wrench when tightening it onto the barrel.

  • 5
    Nice adapter

    Posted by Richard Brandt on Dec 7th 2020

    Works good

  • 5
    Awesome part. Exactly what I was looking for my ASR.

    Posted by Jeffrey on Oct 14th 2020

    This thread adapter is the exact part needed to change the factory .578x28 thread pitch to 5/8x24 thread pitch of my solvent trap. Now I will not get any cleaning solution on my floor when cleaning my 16.5 in carbine rifle barrel. Would HIGHLY recommend Breek Arms to any gun owner that is looking for the hard to find parts. Customer service is great and shipping is fast.