Explosive ordnance sysem; 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 7035-01-166-7857
NSN 6620-00-557-0950
NSN 2925-01-476-3224
NSN 5990-01-604-0862
NSN 5855-01-085-5354
NSN 6110-01-197-7488
NSN 2925-01-485-8304
NSN 4140-00-826-9031
NSN 5996-01-087-3100
NSN 6240-00-603-6662
NSN 5996-01-381-1997
NSN 5905-01-231-8791