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 6130-00-734-5354
NSN 5960-01-481-8051
NSN 5998-01-474-1360
NSN 5935-00-977-7877
NSN 5960-01-313-0681
NSN 6610-01-586-5221
NSN 6620-00-456-9539
NSN 6220-01-301-3302
NSN 5835-00-450-8347
NSN 5975-00-583-2960
NSN 6240-01-280-3382
NSN 5905-01-211-6643