Explosive ordnance system; 5 step block
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 5965-00-927-4074
NSN 5985-00-684-5512
NSN 5920-00-717-6839
NSN 6110-01-228-8384
NSN 6150-01-491-1576
NSN 5950-01-006-7865
NSN 5925-01-089-6970
NSN 6145-00-648-2726
NSN 6620-01-369-4627
NSN 5950-00-834-2924
NSN 6110-01-336-1884
NSN 6220-01-602-9275