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 6320-00-456-2092
NSN 5920-01-287-3343
NSN 6620-00-317-6254
NSN 5985-00-087-4951
NSN 6130-00-295-2661
NSN 6620-01-012-2852
NSN 5915-00-073-0310
NSN 6220-01-231-1766
NSN 6620-00-938-1789
NSN 5905-00-139-2475
NSN 6105-01-061-5471
NSN 5910-01-412-1780