Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C4BM1158-1 found under Spacer Sleeve by Bombardier Aerospace. The National Stock Number assigned to this part is 5365004456270, 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 C4BM1158-1.