Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 504084-401 found under Reel Shoulder Harness Inertia Lo by Amsafe Inc. The National Stock Number assigned to this part is 1680014612917, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 504084-401.