Fx M3 pressure gauge brass washer info

[R0B]

Looking for a bit of info please. I've misplaced the brass washer for the 1sr reg pressure gauge seal (D90 on the parts diagram). I have some brass tube at home, so can knock one up, but need the dimensions. I was wondering if anyone could help with OD, ID and thickness please.

Thanks Rob

 

[M0ist0ne]

I think they're made in various thicknesses to ensure the 1st reg gauge is 'right-side' up when mounted. 

 

[R0B]

Thanks...that makes it more complex...and no part numbers...

 

[bzizzi373]

Just use a Dowdy seal, works better and seals better than the FX brass washer and O RING.

 

[FX-USA TechDept]

 

Hey Rob, this is a great inquiry!

Here is a list of the sizes and their appropriate part numbers. 

Part number, name, OD, ID, Thickness

20615 Brass Washer Ø18xØ14,4 B=1,7
20616 Brass Washer Ø18xØ14,4 B=1,8
20617 Brass Washer Ø18xØ14,4 B=1,9
20618 Brass Washer Ø18xØ14,4 B=2,0
20619 Brass Washer Ø18xØ14,4 B=2,1

If you would like to purchase one of these instead you can reach out to your local distributer. Otherwise, it should fall in this range and is a per rifle measurement based on the thread start location on the gauge bore.

FxUsa Tech Dept.

 

[Grumpy1040]

get the thickest washer from FX and use 400 grit to fit the gage to your liking.