Screw threads?

[GEE TEE]

Can someone tell me what the thread is on the foregrip/vert ASA screws?

[sjrtk]

Classic rail single screw is 1/4-20

Dual RT is 10-32 (IIRC)

[Justus]

That's right. If you're using a 1/4-20 screw, it can't be a standard socket head screw from the hardware store. If so, the head will be too tall to fit between the body and rail. It needs to be a low-profile style socket head screw, which are never available at the hardware stores I frequent.

[Ando]

Ace has the button-head ones (Chinese hat type). You'll need to grind down the sides of the head to fit the rail though. If you don't have access to a shop, easiest way to do it is with a hand drill and a file. Put the screw in the drill and grind the sides of the head down on the file till it fits the hole...or get with Tuna to get a proper one.

[GEE TEE]

Ok thanks guys that's a great help

I thought it was about a 1/4 but couldn't remember exact size

[luke]

The AM FG screw is called a "low head", you can get them here>>

http://www.mcmaster.com/#socket-head-cap-screws/=lky7ji

[GEE TEE]

Thanks Luke