Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 645228-3 found under Setscrew by Parker Hannifin Ltd. The National Stock Number assigned to this part is 5305010612949, 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 645228-3.