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 5996-01-316-0621
NSN 5905-01-542-2936
NSN 6110-01-495-0004
NSN 6645-01-591-3584
NSN 5950-01-160-8176
NSN 5915-00-753-7433
NSN 6130-01-386-5933
NSN 7035-01-556-9060
NSN 6110-01-427-3671
NSN 5985-01-305-5973
NSN 5975-01-604-1311
NSN 5920-00-759-1003