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 5960-01-269-9073
NSN 5930-01-181-2191
NSN 5915-01-477-4402
NSN 5975-00-085-8551
NSN 5895-00-391-8084
NSN 7035-01-384-4383
NSN 5855-01-329-6087
NSN 5945-01-487-4127
NSN 5910-00-446-9131
NSN 6105-01-141-7727
NSN 6130-01-027-0762
NSN 6320-00-646-3311