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 5930-01-149-5723
NSN 5960-00-987-1897
NSN 6610-00-983-4482
NSN 5965-01-408-9551
NSN 5996-00-337-8711
NSN 6135-01-613-9509
NSN 5855-01-262-1766
NSN 6130-00-482-7440
NSN 7035-01-040-6373
NSN 5996-00-542-3997
NSN 6105-01-431-8998
NSN 5835-01-227-2318