Question for hydraulic fitting expert

[arakboss]

Would this fitting thread into buffer tube threads on AR15 lower receiver? If so where could I find these locally (westside preferably). Any other ideas on plug that would have the right thread pattern and would be available at homedepot, lowes?

Edit need plug like this but larger

Eaton Aeroquip FF976708S $5.83 Adpt, MaleORS, 13/16-16, Plug | Zoro.com

Order Eaton Aeroquip Adpt, MaleORS, 13/16-16, Plug, FF976708S at Zoro.com. Great prices & free shipping on orders over $50 when you sign in or sign up for an account.

www.zoro.com

Supposedly the thread pattern of extension tube threads are:

Edit: 1 3/16-16 UN-3B SPECIAL

Major D 1,1875 MIN
Pitch D 1.1461/1.1519 SPECIAL
Minor D 1.1200/ 1.1283

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[Lilhigbee]

Ah our English system. That thread is 13/16" or .8125" OD, but the AR buffer tube thread is 1 3/16", or 1.1875" OD. There is a space in the buffer tube thread pitch between the 1 and the 3. If you can find a 1.1875"-16 threaded fitting it will screw into your lower.

 

[arakboss]

Ah our English system. That thread is 13/16" or .8125" OD, but the AR buffer tube thread is 1 3/16", or 1.1875" OD. There is a space in the buffer tube thread pitch between the 1 and the 3. If you can find a 1.1875"-16 threaded fitting it will screw into your lower.

I caught that after posting, any idea where I might find that locally? For $20 plus shipping I think I can order a cap from Spikes Tactical:

ST22 Pistol Plug

Plug your lower receiver instead of using a buffer tube. This piece is designed to be used with self contained BCG/Buffer assembly type units in the upper. A .22 caliber BCG unit is the most common example.

www.spikestactical.com

 

[Lilhigbee]

A-1 Coupling in Tualatin on Tualatin/Sherwood Road has everything fitting-wise you can imagine.
Depending on how good of a thread fit you need a 30mm-1.5 fitting might work. It is very close to 1 3/16-16. it looks like the standard pitch for 1 3/16" is 12 TPI.

 

[arakboss]

I just found this member had some I am going to message them and if that doesn't pan out I will try A-1. Thank you.

AR15 22lr Dedicated Buffer Plugs

I wanted a nice little fun 22 pistol, but didn't like that the spikes plug won't exactly work with all end plates- I wanted A) the option to run whatever endplate I wanted for choice in sling attachment, etc and B) to be able to still cover the rear takedown detent and the unsightly hole in AR...

www.northwestfirearms.com

 

[arakboss]

I think this might work:

End Cap Plug For Tactical Pistol Grip For Mossberg 500 12 ga 1-3/16"-16 TPI | eBay

Tactical End Cap For the Mossberg 500 Tactical Pistol Grip. This cap presents a clean, finished look to your pistol grip. 1-3/16"-16 TPI. Aircraft Grade T-6 aluminum.

www.ebay.com