NEOPREN Rubber Expansion Nut

Description

For complicated and special situations, the NEOPREN Rubber expansion blind nut offers a unique solution.

Also called Rubber Expansion nuts, or Well nuts, these consist of a flanged neoprene bushing with a threaded nut embedded in the non-flanged end.

As the bolt is screwed into the nut, the rubber on the other side of the hole expands and seals the bolt hole.

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.