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 5835-01-281-7281
NSN 6110-00-059-5350
NSN 5998-00-707-5781
NSN 6105-00-171-6521
NSN 2925-01-434-6945
NSN 5990-00-419-0236
NSN 6650-00-161-4122
NSN 5920-01-645-6082
NSN 6220-00-111-0921
NSN 5985-00-325-3997
NSN 5910-00-678-9716
NSN 6620-01-559-7951