[M3×L5]

This is a bolt with a hex hole (cap bolt) that reduces the outer diameter of the head. Standard cap bolts are ideal for areas where the head diameter is large and cannot be tightened. Hex shaped bolts with holes. Also known as cap screws and socket screws. Tighten using a hex key (hex wrench). This bolt is suitable for tightening in narrow places where it is difficult to work with spanners and wrenches. RoHS 2 compliant product.