Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SS22B128 found under Screw Machine by G E C Marconi Avionics Ltd. The National Stock Number assigned to this part is 5305999644053, 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 SS22B128.