Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PMC90-1 found under Spacer Tapered by Pyramid Machine Corp. The National Stock Number assigned to this part is 5365008966244, 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 PMC90-1.