Grooved Pins - 0.8mm – 25mm dia and up to 120mm length, cold forgoing steels, Aluminium & Brass
Headed Grooved Pins – 1.0mm to 20mm dia to 50mm length, ditto above comments
Grooved Pins incorporate three longitudinal grooves swaged Into a solid cylinder of cold-working material which has the resultant effect of increasing its diameter. These grooves or swage lines can be along part or the full length of the pin and may be tapered or parallel. Grooved pins do not require a reamed or a precisely finished pilot hole, and they provide a much greater area of interference fit than tapered pins.