Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S81663-05-05 found under Conduit Assembly Metal Rigid by Servicair B W Elliott Mfg Co Llc. The National Stock Number assigned to this part is 5975010778675, 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 S81663-05-05.