Male Coupling 2 : A hose nipple with protruding threads that fits into the thread of a female coupling of the same pitch and appropriate diameter and thread count
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}