Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HN949B16-440 found under Screw Machine by Raytheon Company. The National Stock Number assigned to this part is 5305006394621, 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 HN949B16-440.