Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DIN933-M6X40-8.8-B3B found under Screw Cap Hexagon H by Recon Opticalinc. The National Stock Number assigned to this part is 5305013522166, 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 DIN933-M6X40-8.8-B3B.