TK POP NUT™

TK - Thin Head, Knurled Body

The POP NUT™ TK has a thin head knurled body and is available in steeel with hex chrome free plating in both inch and metric thread sizes. The thin head allows for near flush attachment of the mating part without the need for recesses or sheet dimpling. Ther POP NUT™ TK features a wide grip range and excellent thread strength.

The information on this page gives some best practice guidelines about proper joint design for the POP NUT.

The hole for the POP NUT must be square to the parent material. Holes drilled or punched on an angle can cause premature mandrel wear issues. Backside burrs or punch tabs should also be removed so the backside flange can sit flat. Burrs must be removed to the rubber WELL NUT product. A POP NUT located on a tapered parent material can cause installation perpendicularity and mandrel wear problems.

If the POP NUT will be used in a tube, extrusion or other application that is closed on the backside there must be sufficient space for the POP NUT to fit flat against the top surface prior to installation.

The parent material thickness must be within the grip range of the POP NUT. Softer materials such as plastic allow the POP NUT™ to expand in the hole reducing grip range. Testing is required to determine the optimum grip in plastics. When installing a POP NUT in a round tube the material thickness is measured from the top of the tube to a inside surface of the tube where it intersects the hole.

The POP NUT tool must have perpendicular access to the parent material. If the tool is held on an angle premature mandrel wear can occur. Special nose pieces can be created to avoid obstacles.

The Mating part should have a hole size that is smaller than the POP NUT head diameter to assure contact with the head. If alignment tolerances are needed then the hole in the mating material should be slotted so the parent material still touches the head of the POP NUT.

The ideal POP NUT joint is one where the mating part is non-rotational and contacts the head of the POP NUT. The tighter the screw gets the tighter the POP NUT becomes.