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 5960-01-316-0767
NSN 5965-00-888-2643
NSN 5990-01-599-7106
NSN 6105-00-010-0267
NSN 6150-01-438-3997
NSN 5925-00-682-4096
NSN 6645-00-551-8291
NSN 4140-00-886-1710
NSN 6150-01-153-7326
NSN 6620-00-708-3323
NSN 5996-01-506-1764
NSN 6240-01-371-3020