Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A51G20542-11 found under Screw Cap Socket Head by D F P Manufacturing Corp. The National Stock Number assigned to this part is 5305000042984, 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 A51G20542-11.