Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 144US146 found under Screw Trigger Guard by O F Mossberg And Sonsincorporated. The National Stock Number assigned to this part is 5305004622988, 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 144US146.