Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 221-0091 found under Pole Shoe Assembly by Cummins Power Generation Inc. The National Stock Number assigned to this part is 5975006954793, and the Federal Supply Class is 5975 Electrical Hardware And Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 221-0091.