Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HT4U-4 found under Screw Machine by Satair A S. The National Stock Number assigned to this part is 5305000627469, 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 HT4U-4.