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 6135-01-366-9633
NSN 5855-00-688-9954
NSN 2925-01-131-8761
NSN 6650-01-008-0724
NSN 6685-01-105-0083
NSN 6150-01-655-9158
NSN 6650-01-411-3904
NSN 6105-00-598-4910
NSN 6645-00-482-2737
NSN 5925-00-715-7831
NSN 6110-01-433-3479
NSN 5910-01-231-1886