Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PSC738-3U9 found under Screwmachine by Phillips Screw Co. The National Stock Number assigned to this part is 5305016922962, 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 PSC738-3U9.