| 摘要 |
865,464. Nuts. UNITED-CARR FASTENER CORPORATION. Jan. 28,1958 [Jan. 31, 1957], No. 2863/58. Class 89(1). [Also in Group XXII] A sheet-metal-nut which presses a thread in a cooperating plain-stud comprises a slit cylindrical-body 20 with a coned-end 35 providing a continuous helix with a thread-pressing-edge 36, the leading-end of the helix having a roundedcorner 34. The other-end of the body has wings 26 for engagement by a tightening- tool, the edges 42 of the wings digging into the surface of a panel against which the nut is tightened.
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