Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 25645-27B21HDK found under Gage Depth Dial Ind by 3D Instruments Llc. The National Stock Number assigned to this part is 5210013073044, 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 25645-27B21HDK.