AA S400 transfer port screw size

**paul4be** · 31-03-2018, 02:44 PM

Quick one, but can anyone confirm the allen key size for the transfer port grub screw on an AA S400 classic ??

TIA

**Bob P** · 31-03-2018, 03:19 PM

Its a M3 grubscrew so you need a 1.5mm Allen key.
Bob

**paul4be** · 31-03-2018, 03:37 PM

Thanks, tried a 1.5 and it didn't feel to engage in anything, just felt to be spinning in nothing. It hasn't been messed with previously as I removed the A/T screw. Will have another look.

**paul4be** · 31-03-2018, 04:29 PM

All sorted, just that there was NO resistance at all to be felt when turning it. Down to a safer power level now

**Bob P** · 31-03-2018, 05:05 PM

I used to put a drop of blue loctite, didn't like the idea of the blast of air rattling the screw possibly causing either higher or lower power.

**paul4be** · 31-03-2018, 06:13 PM

I'll keep an eye on it and see how it goes. It was running at just over 12fpe with 8.4gr pellets, so not ideal on a factory sealed rifle!!

**Rich** · 31-03-2018, 06:31 PM

Originally Posted by Bob P

I used to put a drop of blue loctite, didn't like the idea of the blast of air rattling the screw possibly causing either higher or lower power.

Also had some success with wrapping the screw in PTFE tape to make it a tighter fit in the tapped hole but a cinch to move as needed.

**lensman57** · 01-04-2018, 08:56 AM

Originally Posted by Bob P

I used to put a drop of blue loctite, didn't like the idea of the blast of air rattling the screw possibly causing either higher or lower power.

^^^^^
This.

A very very small amount at the top of the screw will do.

A.G

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