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AR15.COM
6/24/2026 9:34:36 PM EDT
Does anyone have any idea where I could send a faceplate to along with a few blank backplates that would machine the threads for me?

It’s an odd spindle thread (spindle measure 55mm with an 8tpi thread).

I’ve barely threaded with the lathe so it’s beyond my skills currently and I don’t want to ruin a $100 backplate.
6/24/2026 10:46:09 PM EDT
[#1]
I can help you man. Be best if you can make a plug/thread gauge if you know how and send or one already threaded and I make one
If some of you put this much fervor into your community or church, instead of arguing with people voting for the same politician, the world would be a much better place. -Skg_Mre_Lght
6/24/2026 10:59:00 PM EDT
[#2]
Quote History
Originally Posted By OG1:
I can help you man. Be best if you can make a plug/thread gauge if you know how and send or one already threaded and I make one
View Quote


That’d be awesome if you can help!

I’ll send you an IM.

7/5/2026 4:56:01 PM EDT
[#3]
I'll be honest I would threadmill it and then have you cut it true upon installation because I'm a scared little bitch when it comes to threading in a turning center.
7/6/2026 11:50:34 AM EDT
[#4]
Quote History
Originally Posted By RickFinsta:
I'll be honest I would threadmill it and then have you cut it true upon installation because I'm a scared little bitch when it comes to threading in a turning center.
View Quote


It should be turned true to the machine. Theoretically you could make one that should be close enough but standard practice is to true it to the machine it will be used on.
Life's battles don't always go to the stronger or faster man. In the end, the one who wins is the one who thinks he can! - SCI, NRA
Team Ranstad
7/6/2026 12:55:49 PM EDT
[#5]
That's exactly what I said - I'd thread it in the mill then install and true it in situ.
8/6/2026 3:34:32 AM EDT
[Last Edit: sneaker][Edited] [#6]
Standard procedure to true up a new backing plate with it secured to the spindle before mounting anything to it. That's all he was saying. He just meant that there's nothing about it that makes you a scared little bitch. Should be done *every* time. There are always small variations on lathes - spindle runout or thread anomalies or slight shoulder runout, etc.

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