Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K15K0021-138 found under Elbow Electrical Co by Mcdonnell Douglas. The National Stock Number assigned to this part is 5975012148496, 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 K15K0021-138.