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 6145-00-632-3229
NSN 5990-00-524-2293
NSN 6685-00-868-2531
NSN 6650-01-082-8962
NSN 6105-00-694-5459
NSN 7035-01-503-5517
NSN 5975-01-618-3657
NSN 5835-01-076-4091
NSN 5998-01-527-3432
NSN 5960-00-304-8668
NSN 5855-01-187-2293
NSN 6145-01-571-7928