| 摘要 |
The invention provides a nut and cap assembly, wherein the nut has relatively flat external side faces symmetrically located about a central axis, the side faces being symmetrical on opposite sides of a central plane perpendicular to the axis of the nut. Each of the side faces has two axially extending slots formed therein on opposite sides of the central plane. The slots are separated at their inner ends by a bridge portion in the respective side face of the nut. The assembly also includes a cap formed of relatively stiff resilient plastic material with a socket formed therein, corresponding generally to the shape of the nut. Each interior side wall of the socket of the cap has a projection extending radially inward and having a ramp portion facing toward the socket opening. During assembly, each projection is initially received in one slot of the nut, and during axial movement, the ramp of each projection engages the respective bridge portion of the respective side face of the nut so that the projection is urged radially outward. This flexes the socket walls sufficiently that the projections move axially over and beyond the bridge portion and lock in place in the other slot of the respective side face to secure the cap to the nut. |
