Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SP-59 PIECE 51 found under Setscrew by Beach Russ Company. The National Stock Number assigned to this part is 5305007245898, 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 SP-59 PIECE 51.