A rectangular or square precision tool having a flat working surface(s) of specific flatness. It is used as a datum plane in connection with various layout, inspection, and calibration operations. It may also be used as a lapping plate, but is not grooved. See also block, lapping; plate, duplex, surface and lapping; and plate, lapping.
NSN 6645-01-337-8292
NSN 7035-01-432-2424
NSN 6105-01-003-5902
NSN 5855-01-369-5037
NSN 5915-01-468-0053
NSN 6220-00-146-3226
NSN 5935-01-097-4026
NSN 5950-01-543-9019
NSN 5895-01-232-4006
NSN 7035-00-631-3782
NSN 5950-01-424-7267
NSN 5945-01-248-2208