Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number IG816A found under Spacer Ring by Marine Engine Specialties Div Of. The National Stock Number assigned to this part is 5365002624771, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like IG816A.