Here is a composite cork gasket for 2" Push and Twist petrol and oil filler caps on British motorcycles including - BSA, Norton, Triumph, AJS, Matchless and others.  OEM part number 82-4047

In the photographs you can see these gaskets fitted to my own '71 Triumph T150v, '68 BSA B25 Starfire and '71 BSA A75 Rocket III.  Also suitable for the early BSA Bantam (D1, D3) fuel filler.  Note: the oil caps and motorcycles are included in the photos for illustrative purposes ONLY.  They are NOT included with the gaskets.

These gaskets are made from CC2020 cork composite material and are 1/16" thick (1.5mm) with an outside diameter of 47mm and an internal of 34mm (approx.)  Its toughness and good compressibility make it suitable for a wide range of applications.  The material has a very low swelling in oils and fuels.  It uses a neoprene/nitrile binder.  See spec. sheet.

These gaskets have been specially made for me in the UK.

If you have any questions please ask.

I always leave feedback once I know that the good have arrived safely.