Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MAS4387-1-298 found under by Giat Industries Centre De Tarbes. The National Stock Number assigned to this part is 5220007319938, and the Federal Supply Class is 5220 Inspection Gages And Precision Layout Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MAS4387-1-298.