规定了轴向型螺纹接头的外壳尺寸，并确定了螺纹接头区域内允许连接润滑枪的间隙空间，以及润滑过程的工作角度尺寸。螺纹接头的尖端设计是可选的，前提是外形仍在图1所示的包络内。

Specifies the envelope dimensions of axial type nipples and determines the clearance space which shall be provided in the region of the nipple to allow the lubricating gun to be connected, and the operating angle dimensions for the lubricating process. The tip design of the nipples is optional provided the profile remains within the envelope shown in figure 1.