Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B-2.101M found under Screw Cap Hexagon H by General Motors Corp. The National Stock Number assigned to this part is 5305012910156, 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 B-2.101M.