Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 490177 found under Plug Protective Dus by Alliant Techsystems Operations Llc. The National Stock Number assigned to this part is 5340009246088, 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 490177.