Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ISO4017 M12X40 8 8 A3P found under Screw Cap Hexagon H by International Organization. The National Stock Number assigned to this part is 5305123342197, 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 ISO4017 M12X40 8 8 A3P.