these non-vented caps are 1-5/16"-12 thread and the Buna-N O-ring seal is gas and oil resistant and keeps your fluids contained

Nobody ever complained about a little extra cushion

Rebuild kit for Guide spotlight used on all 1938-1961 Harley-Davidson models

OEM# 4636 includes lockwashers

These risers are designed for a 'pass through' bolt

#9888-16 Head Bolt Kit 1951-1973 Harley-Davidson WL/G - Chrome Plated Brand_K&N Air Filters these non-vented caps are 1-5/16"-12Accurately machined, heat treated, and chrome plated bolts used with Cast Iron Heads on all WL & G models 1951 1973. OEM# 16813 51 and 16809 40. Made in Ohio, USA.