Mushroom Round Head Square Neck Carriage Bolt

Feature:
1.Carriage Bolts are designed to fasten a wooden face to either wood or metal.
2.Flat head provides a semi-flush finish to applications.
3.The heads is designed to eliminate the need for a washer.
4.Square underside of the head is self locking to eliminate the need for a driving tool .

A carriage bolt, coach bolt or round head square neck bolt is a form of bolt used to fasten metal to wood. It is distinguished from other bolts by its shallow mushroom head and that the shank cross-section of the bolt is circular for most of its length, as usual, but the portion immediately beneath the head is formed into a square section.This product includes Carriage Bolts Set Round Head Square Neck Screws with Nuts and Washers.

Carriage bolts have a dome shaped head and a square neck generally requiring a hex nut and flat washer. The square neck makes them self-locking when used within a square hole.