Jergens, Inc. has announced precision-ground, heat-treated alloy steel pull dowel pins in three different styles: Spiral Groove, Flat Vent or Standard Round. All Jergens pull dowels meet ASME/ANSI B18.8.2 specifications, with a surface hardness of 60-64 Rockwell C and a core hardness of 47-58 Rockwell C. They are available in diameters from 1/4 to 1 in. and corresponding lengths from 1/2 to 4 in. Pull dowel pins are used to prevent motion or slippage when locating workpieces on a fixture plate. When a pin is REPLACEed into a blind hole, air is forced into the hole.