AN INTERCONNECTING PIPE WITH A MALE NPT FITTING ON BOTH ENDS; USED IN PROCESS FITTINGS
The nut that secures the end of a spoke to the rim of a bicycle wheel Nipples have a normal right-hand thread, but because they are normally seen from the "bolt" side, it is often confusing which way to turn them It is as if you were watching the hands of a clock move clockwise, but the clock was transparent, and you were looking from behind it Of all the things bicycle mechanics do, adjusting spoke nipples is the one that requires the most skill and experience If you wish to learn more about this process, see my article on Wheelbuilding
{i} tip of mammary gland of mammals; place out of which milk flows from the female breast; any nipple-shaped device (e.g. pacifier, bottle top, etc.); threaded projection for connecting pipes