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 4140-00-179-3977
NSN 6110-01-423-0739
NSN 5985-00-151-4538
NSN 6105-01-535-0999
NSN 5998-01-140-4117
NSN 5965-01-113-9061
NSN 5945-00-673-2309
NSN 5930-01-157-1442
NSN 5945-01-184-8350
NSN 5835-01-632-6627
NSN 6130-01-092-4882
NSN 6110-00-124-8940