Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 256 6758642 FIND PJJ11 found under Screw Cap Socket Head by Electric Boat Corporation. The National Stock Number assigned to this part is 5305016591311, 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 256 6758642 FIND PJJ11.