It fits all 1" handlebars and has a 14 mm bore size

and keep it tidy

if you have a leak oil will get past the seal and leak into the dry timing housing

These are nice when used in conjunction with our threaded 5/16"-18 bungs as they are the same diameter and make for a seamless mount

27-1/4" diameter measured straight across tip to tip

#8400-8 Rocker Shaft Cap Nut & Washer Kit 1966-1985 Harley-Davidson Shovelhead 1957-1985 Sportster - Chrome Plated Subcategory_Tachometer Cables It fits all 1" handlebarsChrome plated rocker shaft nuts will replace the stock red dot nut on rocker shafts all 1966 1985 Harley Davidson Shovelhead and 1957 1985 Sportsters. Made in Ohio, USA.