Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FED-STD 156 found under Coupling Electrical Conduit by Federal Standards. The National Stock Number assigned to this part is 5975001008801, 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 FED-STD 156.