Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HB8-M10X40 found under Screw Cap Hexagon H by Flowserve Corporation. The National Stock Number assigned to this part is 5305013798215, 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 HB8-M10X40.