Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20221-01 found under Panel Electrical Electronic Equi by Allied Technology Group Inc. The National Stock Number assigned to this part is 5975015427722, 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 20221-01.