Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R2 56X3 16 2701 L found under Screw Machine by A P M Hexseal Corporation. The National Stock Number assigned to this part is 5305013926438, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R2 56X3 16 2701 L.