Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3M1131-2 found under Screw Shoulder by G S Precision Inc. The National Stock Number assigned to this part is 5305012357495, 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 3M1131-2.