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 6610-00-679-4835
NSN 2925-01-444-6676
NSN 6135-01-329-7994
NSN 5990-00-827-0684
NSN 5835-01-198-2221
NSN 6110-01-519-9131
NSN 5925-01-379-0451
NSN 5905-01-356-3183
NSN 5998-00-227-4944
NSN 5855-01-518-5278
NSN 5996-00-821-8136
NSN 5998-00-491-3794