Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SCPHP6 321 4SS found under Screw Machine by Heatcon Composite Systems Inc. The National Stock Number assigned to this part is 5305015420282, 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 SCPHP6 321 4SS.