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 6220-01-359-8322
NSN 7035-00-541-8516
NSN 5996-01-529-0639
NSN 6110-01-364-0322
NSN 5895-01-080-1657
NSN 6130-00-335-6812
NSN 6240-01-274-4237
NSN 6110-00-501-5585
NSN 5905-01-044-8477
NSN 5925-00-525-4037
NSN 6105-00-204-9342
NSN 5960-01-142-1995