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 6110-00-344-4088
NSN 6110-01-393-5093
NSN 6110-01-422-6794
NSN 6130-00-992-2294
NSN 6610-01-504-1276
NSN 5835-01-277-9327
NSN 5950-01-237-1450
NSN 5930-01-500-9057
NSN 6145-01-534-7332
NSN 5990-01-565-2226
NSN 6610-00-253-7676
NSN 6220-00-808-6072