Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C4BM1663-1 found under Pin Grooved Headles by Bombardier Aerospace. The National Stock Number assigned to this part is 5315000605757, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like C4BM1663-1.