Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BC1 0047 021 found under Holder Lamp by Bruce Aerospace Inc. The National Stock Number assigned to this part is 6240016265272, and the Federal Supply Class is 6240 Electric Lamps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BC1 0047 021.