Airarms s410 transfer port screw size

[ken69]

Going to try these for fit on my AA S410 and S510. https://www.westfieldfasteners.co.uk..._SHBtn_M3.html
Ordered some today in M3x5 to replace the external AT screw. Should arrive next week, will let you know how I get on for fit

[TenMetrePeter]

I use M3 x 4mm stainless button head hex socket screw from e8ay.
Someone on that site is selling them as an air arms spare for nearly 4 quid each but that should get you a pack of 5. The black M3x5 ones should be ok as the hole is pretty deep.

[bezzer]

I used security M3 torx button head screws on my 400 and HFT500, always found torx to be more resistant to rounding off than an allen head at M3 size. Got 10mm ones then ground them down a mm or two to make them flush with the bottom of the hole.

[the growler]

Thanks guys. Will look into getting some for my airarms. I hate looking at the broken silver anti tamper pin in the side. It looks naff.

[ken69]

I use M3 x 4mm stainless button head hex socket screw from e8ay.
Someone on that site is selling them as an air arms spare for nearly 4 quid each but that should get you a pack of 5. The black M3x5 ones should be ok as the hole is pretty deep.

Gents, the plan is to fit a 3x1 O ring to the M3x5 button head which will reduce it's penetration into the hole a tad and also give a nice airtight seal. Will let you know how well it works