| 摘要 |
That fits into a cavity in a board, this is joined by a screw accommodated in another board in order to join the two. The nut in question is made up of two pieces, an enveloping body (1), similar from the exterior as a conventional nut of this type, except that it has a wide diametrical groove (3), with a narrowed opening (4), and a nut per se (5) which fits into the diametrical chamber (3), making it impossible to turn or move axially, but enabling a longitudinal displacement within the groove, in order to absorb possible maladjustments between the boards to be joined. <IMAGE>
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