Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HO4-3 8-16X6 found under Setscrew by Flowserve Corporation. The National Stock Number assigned to this part is 5305014370488, 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 HO4-3 8-16X6.