Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 609-1638-001 found under Fastener Angle by Sierra Nevada Corporation. The National Stock Number assigned to this part is 5340010342625, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 609-1638-001.