Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C2638PC61A found under Spacer Ring by Milton Roy Co. The National Stock Number assigned to this part is 5365009646493, 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 C2638PC61A.