Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 313600 found under Screw Cap Socket Head by Simpson Lawrence Ltd Johnson And Evi. The National Stock Number assigned to this part is 5305012166606, 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 313600.