Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S45-313 found under Screw Cap Hexagon H by Reelcraft Industries Inc. The National Stock Number assigned to this part is 5305016483508, 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 S45-313.