Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FPE21L28-9 found under Motor Control by Singer Co The. The National Stock Number assigned to this part is 6105009134837, and the Federal Supply Class is 6105 Motors Electrical. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FPE21L28-9.