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 5855-00-494-9581
NSN 5905-01-477-2945
NSN 5930-00-222-4682
NSN 6135-00-182-7008
NSN 6240-01-218-5187
NSN 6130-00-827-1967
NSN 5998-01-399-3416
NSN 2925-00-782-1498
NSN 6135-01-142-6456
NSN 5990-00-974-1918
NSN 5985-00-962-0214
NSN 5835-01-384-3206