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 5996-01-030-1387
NSN 5895-01-509-0923
NSN 5990-01-230-2827
NSN 5895-00-915-6403
NSN
NSN 5985-00-448-7417
NSN 5965-01-599-5448
NSN 5965-01-053-6230
NSN 5855-01-187-2293
NSN 5925-00-478-3352
NSN 5925-01-262-6152
NSN 5950-01-218-5639