Air Arms S410 O Rings

[Blackmax]

Hi All,
I've got an Air Arms S410 to service and I wondered if anyone had a list of the O ring sizes please?

Regards

Andy

[Trumpetier]

Pm sent

[Phil Russell]

As far as I know these are the sizes you get in a kit, plus maybe a few more. If you discover differently, please post on here.

AIR ARMS PART AA Code O RING
S400/410
Cylinder seals (2) RN234 BS213
Magazine ring S556 22 x 1.5
New style external filling seals (2) S474 12 x 2
Old style filler valve Dowty seal 1/8
Internal filling seals (2) S484 12 x 1.5
Pressure gauge seal RN219-9 BS011
Loading bolt buffer S650 8 x 1.25
Barrel seal .22 S538 BS009
Transfer port seal S427 6 x 1
Pressure gauge mount lower seal S427 6 x 1
Pressure gauge upper seal (bolt) S536 BS008
Barrel seal .177 FP121 1.5 x 4.5
Filling valve internal seal S327 BS005 90 shore

Cheers, Phil

[bezzer]

Nice one, one thing I would say is some will pipe up that the transfer port O ring is better at 1.25 or 1.5 thickness. I reckon the OE x1 is plenty good enough, anyone not finding that should check the small under barrel grubscrew isn't sticking out proud at all, given the close tolerance of the upper and lower halves anything in the way will affect the sealing.
Using a thicker O ring makes you use more force to get the two halves flush together which can't be a good thing in the long run.
I did try a thicker one once when I hadn't got an OE at hand and found I was getting blowby by the telltale spread of silicone grease round the hole when I checked it, tried another and it did it again. The bolts were done up as much as I dared.

[p.j.]

I have a complete full seal kit - S701 for the S400/410, genuine Air Arms supply if you are interested?