crest of screw thread 螺纹牙顶 ; 螺纹顶

angle of screw thread 螺纹截形角

lead of screw thread 螺纹导程

pitch of screw thread 螺距

Number of inch screw thread 英制螺纹种数

Number of metric screw thread 公制螺纹种数

Pitch diameter of screw thread 螺纹中径

true representation of screw thread 螺纹真实表示法

Thread of lead screw 丝杆螺距

internal thread of ball screw 滚珠丝杠副内螺纹