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 5965-00-452-0967
NSN 5910-01-247-3385
NSN 5998-01-485-3305
NSN 6685-01-041-2366
NSN 5960-01-056-4982
NSN 5950-00-041-6554
NSN 2925-01-458-5808
NSN 4140-00-689-3473
NSN 5985-00-409-4501
NSN 5945-00-138-3322
NSN 5996-01-044-6241
NSN 6650-00-824-0745