Lyman Clean Out Screw size

[morehops52]

I just replied recently to the thread about a buggered clean out screw saying I never took mine out. Got home from the range the other day and when I cleaned my GPH barrel I found the the clean out screw had come out. It's not stripped so I don't think it blew out, but I need another one. I found one place online that has them but didn't indicate the size. Searching here hasn't helped. Calipers measure 3.75mm outside thread diam x 6mm long. I'm going to Ace Hardware and would like to know what designation to look for. Thanks for help.

 

[Phil Coffins]

Any, then screw it in and cut it off peening is optional. Blend it in with a file and sand paper then cold blue.
D8F7C0C3-03A8-476C-9233-857D13F7572B by Oliver Sudden, on Flickr

 

[Winterhawk]

Bring your lock with you and try screws until you get the right one. They should be metric unless someone changed it out, but you know that already.

 

[SmokepoleSam]

A clean out screw is on the barrel not the lock. I make the same brain mistakes myself.

 

[morehops52]

I guess I'll have to wrap up the barrel so it looks like a pipe and take it with me. I was hoping that someone with experience in this type of screw might have given me something like M3x6 hexhead or whatever. As it's a Lyman it shoud be metric and what little know (?) about metric threads this small is M2= 2mm, M3= 3mm, Ect. I don't know if there is a M3.75 or if there is a different designation I should b e looking for.

 

[gustaf]

I have a Lyman Great Plains Hunter flintlock that I bought a few years ago and it's made by Investarms of Italy. The screws on the rifle are metric. Of course I can't check the cleanout screw because it doesn't have one but the flash hole screw is metric. My suggestion is to go to the hardware store and see if they have any metric set screws and buy several. Fastenal is another option.

 

[morehops52]

Got it! Ace hardware had it of course and it turned out to be a M4 x 6mm. Of course I bought extra. Fitty cent each

 

[Phil Coffins]

I just got one for my Lyman pistol and it is m4 x .07