OO-D-2776, FEDERAL SPECIFICATION, DRILL, PNEUMATIC DRIFTER, SELF-PROPELLED, CRAWLER MOUNTED (TRACK DRILL) (12 NOV 1992)

OO-D-2776, FEDERAL SPECIFICATION, DRILL, PNEUMATIC DRIFTER, SELF-PROPELLED, CRAWLER MOUNTED (TRACK DRILL) (12 NOV 1992)., This specification covers two types of self-propelled, crawler mounted, drifter drills (referred to hereinafter as "track drill"), having not less than a 4.75-inch cylinder bore.