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 6110-00-325-4519
NSN 5960-00-584-4553
NSN 5975-01-427-3521
NSN 5990-01-321-2997
NSN 5999-01-025-4518
NSN 5910-01-255-4182
NSN 6130-00-153-3136
NSN 5905-01-200-0161
NSN 5985-00-941-5206
NSN 5975-00-338-6242
NSN 5998-01-539-6523
NSN 5930-00-684-2991