Aluminium Crush Washer Packs From:

Here at Speedflow, we have a comprehensive range of aluminium crush washers, used to seal male adapters, banjo's, and plugs that screw into a hole with a flat machined surface to accept a washer.

Available in metric and imperial sizes, sold in packs of 10 (X) or 100 (C). 

We recommended that washers are a one use item and should be replaced when servicing fittings or components to avoid any leaks.