The size of the housing is 1 7/8" diameter x 1 5/16" long

and Washers Fits 1936-86 Big Twin 4 Speeds (except Softail models)

#BHC-8001 3/8-16 x 5/8 inch Length Chrome Button Head Allen Bolt - 10 Pack

reduces friction

OEM style hardware and gaskets used to restore instrument panel base on 1939-1946 Big Twins

3 position Ignition Key Switch Replaces Harley-Davidson OEM #71425-77 - Black Body / Black Bezel Length_25MM The size of the housingThis motorcycle ignition switch is nice and compact and features a black bezel and black body. This all purpose keyed ignition switch can be used when wiring your bike, it features 3 positions, off, accessories, and on. Easy to wire. This ignition switch measures 2 inches long from bezel to the back plate and 1 1 4 inches in diameter. Comes with two keys. This switch utilizes a 3 4 inch D shaped mounting hole. It is a direct replacement for Harley