| nipple |
A piece of pipe, having an outside thread at both ends, used for making pipe connections. Close nipples are those that are threaded throughout. Short nipples are those having a small amount of unthreaded surface between the threaded ends. Shoulder nipples are those having a shoulder between the two pipe threads. Sub-nipples are those having different threads on the ends. Long nipples are those having a length of from 4 to 12 inches. ...
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