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Well nut : ウィキペディア英語版
Well nut
A well nut is a type of fastener used to blindly fasten a piece (much like a molly bolt) and to seal the bolt hole.
It consists of a flanged neoprene bushing with a nut embedded in the non-flanged end. The bolt is passed through one of the pieces to be fastened and threaded onto the nut from the flanged end. The non-flanged end is then inserted through the other piece to be fastened. As the bolt is tightened, friction from the neoprene flange against the piece being fastened prevents the nut from turning. The bushing is compressed by the nut, forming a lip behind the piece being fastened, which compresses the fastened piece and seals the bolt hole. It can also be used in a solid workpiece. As the screw draws the embedded nut towards it, the walls of the well exert a force on the hole walls, anchoring it.〔Smith, pp. 112–114.〕
Well nuts are not particularly strong, but are useful for sealing holes and/or isolating vibrations.〔Smith, p. 114.〕
==History==
The well nut was originally developed by the United Shoe Machinery Corporation.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Well nut」の詳細全文を読む



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