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Description
A carriage bolt (coach bolt or round head square neck bolt) is a form of bolt. It is distinguished from other bolts by its head: the shank 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 makes the bolt self-locking when placed through a square hole, or a round hole in most wood. This allows the fastener to be installed with only a single tool, a spanner or wrench, working from one side. The head of a carriage bolt is usually a shallow dome. The squared section is of the same size as the diameter of the bolt shank, with a plain unthreaded shank. Carriage bolts were developed for use through iron strengthening plates on either side of a wooden beam. It is commonplace though to use them into bare timber, the squared section giving enough grip to prevent rotation.(Quote from Wikipedia) If you have further questions or any interesting of screws. feel free to call or email us. It's our pleasure to solve your problems. TEL: 886-7-6217249 FAX: 886-7-6220069 Email: [email protected] |