| 摘要 |
This lock screw-nut, which has an upper flange with a thread, is made with a longitudinal U-shaped flute grooving, which forms orbicular arc segments with a spiral outer spring reduction. The spring is zinced while heating and made of spiral steel, and can operate when the temperature is not lower than 250 degrees C. If the spring operates at a higher temperature than 250 degrees C, it is made of stainless steel, and if it operates at a much higher temperature, it is covered with copper by electrolysis. |
