Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E.F. 3 4BLACK SMALL CARTON found under Conduit Metal Flexi by Hyspan Precision Products Inc. The National Stock Number assigned to this part is 5975013013684, 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 E.F. 3 4BLACK SMALL CARTON.