Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DIN931M8X70-8.8DBL8451.21 found under Screw Cap Hexagon H by Navantia Sa. The National Stock Number assigned to this part is 5305121428497, 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 DIN931M8X70-8.8DBL8451.21.