Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number US 43170 PIECE 5 found under Screw Cap Socket Head by John Crane Inc. The National Stock Number assigned to this part is 5305012714574, 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 US 43170 PIECE 5.