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 6610-00-367-9603
NSN 6220-01-340-9522
NSN 5999-01-122-4319
NSN 2925-00-928-5931
NSN 6650-00-877-6972
NSN 5915-01-247-8991
NSN 5915-01-413-1225
NSN 6240-01-398-2887
NSN 5905-00-500-8576
NSN 5965-00-146-8588
NSN 6110-01-565-8641
NSN 5960-01-309-5933