| 摘要 |
This invention provides a captive screw and a nut, the captive screw including a collar having an opening receiving the shank of a screw, the opening having a portion of wide diameter and a portion of narrow diameter. The screw has a full-depth thread at its outer end, and a truncated thread inwardly thereof, the truncated thread being dimensioned to pass through the narrow part of the opening in the collar while the full-depth thread cannot so that the screw is retained by the collar yet the end of the screw can be entirely retracted within the collar. The nut assembly includes a sleeve with an external shoulder, a straight knurl, and a flarable end, internally having a hexagonal portion in its bore. The nut has a hexagonal portion which extends into the sleeve and is smaller in lateral dimension than that of the opening to permit lateral floating movement, and longer axially than the hexagonal portion of the bore, to permit relative axial movement of the nut relative to the sleeve. The nut and sleeve have interengageable abutments to limit the axial movement of the nut relative to the sleeve.
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