Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21C863G002-L found under Gage Depth Dial Ind by Mk Test Systems. The National Stock Number assigned to this part is 5210002931942, and the Federal Supply Class is 5210 Measuring Tools Craftsmens. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21C863G002-L.