C.F.R. » Title 30 » CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR › SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH › PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES › Subpart F—Drilling and Rotary Jet Piercing

30 C.F.R. § 57.7806

Oxygen intake coupling

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The oxygen intake coupling on jet piercing drills shall be constructed so that only the oxygen hose can be coupled to it.