Old's Cool Choppers
ONE - Washer flat used between the nut and the crush washer
This is used to prevent the rubber / fiber from being damaged from the turning of the nut.
FIts over all 1/4 npt thread bungs
.743" outside .500" inside
Fits the uk Style petcock
part # 70-8896
Install with with crush washer washer part # 70-7351 (SOLD SEPARATELY)