| 释义 |
unified screw thread
unified screw thread n (General Engineering) a screw thread system introduced for defence equipment (1939–44), in which the thread form and pitch were a compromise between British Standard Whitworth and American Standard Sellers: adopted by the International Standards Organization unified screw thread
unified screw thread[′yü·nə‚fīd ′skrü ‚thred] (design engineering) Three series of threads: coarse (UNC), fine (UNF), and extra fine (UNEF); a ¼-inch-diameter (0.006-millimeter) thread in the UNC series has 20 threads per inch, while in the UNF series it has 28. |