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 6135-00-577-8429
NSN 6220-00-996-4285
NSN 5985-01-256-4096
NSN 6150-00-596-8766
NSN 5998-01-100-1678
NSN 5998-00-883-1629
NSN 6135-01-067-8331
NSN 5996-01-399-6677
NSN 5985-01-073-1005
NSN 5960-01-370-4285
NSN 5950-01-094-7316
NSN 5855-00-548-4742