Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 63S0108 found under Screw Cap Socket Head by Sears Mfg Co. The National Stock Number assigned to this part is 5305015489909, 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 63S0108.