DIN 934 A4 stainless steel left-hand hex nuts are used in metric bolted joints where left-hand threading and high corrosion resistance are required. Unlike a conventional right-hand thread, a left-hand nut is tightened counterclockwise. On rotating components, left-hand threads can be used where the direction of rotation could otherwise tend to loosen a right-hand nut – with the appropriate direction of rotation, the movement instead tends to tighten the nut. The range includes DIN 934 hex nuts in A4 stainless steel with metric left-hand threads in multiple sizes. They are used in machinery, rotating equipment and other engineering applications requiring left-hand threaded fasteners with high corrosion resistance.