Round-head coach bolt (DIN 603) in A4 stainless steel with an M10 thread and 20 mm shank length. The square collar under the head grips into timber or a slotted rail to lock the bolt against rotation while the nut is tightened. Commonly used with Øglænd System channel and support frameworks in marine, offshore and other corrosion-exposed installations. Package of 200 pieces.