Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2-1-15A found under Setscrew by Dings Co. The National Stock Number assigned to this part is 5305012589101, 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 2-1-15A.