The socket screws are

DIN 912 / ISO 4762 Socket Cap Screw A2/A4 Stainless Steel

and the washers are

DIN 125 / ISO 7089, 7090 Flat Washer A2/A4 Stainless

It says they are A4 on the bags.

http://fullerfasteners.com/products/...rew-stainless/
http://fullerfasteners.com/products/...her-stainless/

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