Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 42450 found under Shears Metal Cutting Hand by Marshall Swartchild Co. The National Stock Number assigned to this part is 5110001800653, and the Federal Supply Class is 5110 Hand Tools Edged Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 42450.