stainless steel Knurled Pins

These are similar to grooved pins in that they have serrations around the diameter. However, knurled pins feature many more serrations. They are press fit fasteners that, when compressed into a hole, extrude radial forces to hold the fastener in place.

• The best fastener for die casting and plastic application; superior fastening in the assembly of components which have thin cross sections and for formed sheet metal hinges
• Available with straight, helical or diamond knurling
• All knurled pins are special order
• Various diameters, lengths and end
  configurations available
• Style Choices: Straight, Diamond & Helical
• 

Knurled pins

They are similar to grooved pins because they have serration around the nominal diameter of the pin. The knurled pin differs from the grooved pin while there are many serrations on a knurled pin. Also, knurled pins are typically roll formed whereas grooved pins are swaged. A knurled section may have either a straight knurl, a helical knurl, or a diamond knurl configuration. Knurled pins are available with nominal diameters from 3/32" through 3/8" and lengths from 3/16" through 3

Function

The serrations on a knurled pin, when compressed by insertion into a hole, result in forces, which hold the fastener in place. Radial forces are more evenly distributed around the diameter of a hole for knurled pins than for grooved pins. This is because a knurled pin has more points of contact with a hole than a grooved pin. The teeth may broach the mating hole when the material is softer and more ductile than the pin material.

The amount of expansion is predicated on the knurl pitch. Coarse knurls provide greater expansion than fine knurls. A knurled pin should have a minimum of 15 teeth to allow proper feed and rolling capability. The number of teeth must be a whole number to allow for proper tracking and avoid slivering. The capability on expanded diameter tolerance is +/-.002.