Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R147 found under Screw Trigger by O F Mossberg And Sonsincorporated. The National Stock Number assigned to this part is 5305003448943, 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 R147.