A carriage bolt, also known as a coach bolt, contains a domed or countersunk head, having a shank topped by a short square area beneath the head. Compared with "regular" bolts, a carriage bolt provides a sleek head that doesn't acknowledge tools; as an alternative, counter-rotation is supplied by the https://donovanorpnj.theblogfairy.com/28934146/a-review-of-types-of-screw-heads-uk