Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 57D677 found under Harness Aircraft Safety Shoulder by Human Systems Div. The National Stock Number assigned to this part is 1680005552938, 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 57D677.