Coach Bolts are commonly called Carriage Bolts. They have a mushroom head and square neck which can be placed inside a recess to aid tightening the nut.
Often used to hold framing type timber together, particularly where a decorative finish is required or where the head side is in a heavy foot traffic area to reduce personal injury caused by rubbing past a protruding head i.e. decks, railings and steps.
Most Coach Bolts are made to DIN 603 standard but in the longer lengths (over 150mm) they are also made with extra thread so they can cover a wider range of clamping thicknesses.
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