2 each Primary Cover Gasket Pre-unit Triumph 650 500 Alternator 5T 6T 57-1057 * The OD is 1 1/16"

The OD is 1 1/16" the threads are 26tpi

These measure 5/8" ID

If you want a continuous 6' piece then order quantity 2 / The ID is 1/4" x 3/8" OD / This is pure polyurethane and hold up great and stays pliable with the new fuels

Fits all Triumph and BSA 441

Years: 1964 1965 1966

2 each Primary Cover Gasket Pre-unit Triumph 650 500 Alternator 5T 6T 57-1057 * The OD is 1 1/16"You will get the pair of primary gaskets that are pictured This is correct for the models described in the title If you have some other model with generator, suspension, or dynamo, then you will require a different primary gasket. Condition: NEW Brand: STEADFAST CYCLES Country Region of Manufacture: UNITED KINGDOM Manufacturer Part Number: 57 1057