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<p>[QUOTE=&quot;lptools, post: 1191310, member: 12131&quot;]Hello, Thanks for the reply. Pneumatic fittings are usually a Right Hand Pipe Thread. &quot;Oxygen and Acetylene regulators connect differently to their cylinders so they can not be mixed up. Oxygen regulators have right-hand threads and regulators for Acetylene and other fuel gases have left-hand threads&quot; . Left hand threads are also common on table saw arbors. All of this applies to here in the states, may be different in Canada, or overseas.[/QUOTE]</p><p><br /></p>

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