Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AIR-31 found under Stud Locked In by American Telephone And Telegraph Co. The National Stock Number assigned to this part is 5307010857039, and the Federal Supply Class is 5307 Studs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AIR-31.