Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number N28-K1 found under Frame Assembly by Spd Electrical Systems Inc. The National Stock Number assigned to this part is 5975011844447, 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 N28-K1.