J.W. Winco Inc. offers GN 319.2 phenolic plastic revolving ball knobs, long shoulder type, tapped, in inch and metric sizes.

These RoHS-compliant revolving ball knobs can be utilized instead of other revolving handles, i.e. with handwheels. The tapped shoulder allows the ball knob to be mounted from the underside via a screw or bolt. The knob can then be easily mounted to sheet metal in a variety of thicknesses, flat bar, or castings, to create a quick cranking or turning mechanism.

The hand piece is black phenolic plastic (Duroplast PF), and the shoulder is made of zinc-plated, blue passivated steel, blind-tapped.