Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 537-040-401-000 found under Clip Retaining by Tyco Valves And Controls Lp. The National Stock Number assigned to this part is 5340014134519, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 537-040-401-000.