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Author: Site Editor Publish Time: 2023-01-25 Origin: Site
A round head carriage bolt is a threaded fastener designed primarily for use in wood, but can also be used to fasten metal parts. Also known as plow bolts or carriage bolts, round head carriage bolts can be found in a variety of lengths, diameters, and pitches in many hardware stores.
Here is the list of contents
Materials used in the manufacture of round head carriage bolts
Design of round head carriage bolts
Roundhead carriage bolts and nuts
Advantages of round head carriage bolts
Dimensions of round head carriage bolts
Roundhead carriage bolts are usually made from various types of steel because of their superior strength and durability, but of course, this does not mean that round head carriage bolts can only be made from steel, other materials can also be used to make them.
The design of a round head carriage bolt consists of a large round head with a protruding male threaded bolt on top of the dome. The male threaded bolt head is at least twice the diameter of the bolt shaft and usually does not have a slot for a screwdriver or other driving device. Below the bolt head, there is a square fitting that clamps the wood as the bolt is placed and tightened, preventing it from twisting or turning and maintaining a tight fit, increasing the tightness of the wood and making the wood component more secure.
Special versions of the round head carriage bolt and nut combination may be made of metals such as corrosion-resistant galvanized steel and can therefore be used in wet environments or where the bolt may come into contact with corrosive chemicals. Typically, round-headed square-neck bolts are used for pre-drilling; in most cases, this is necessary because the bolt cannot be driven through its rounded head.
Holding the bolt in the proper position for a square fitting means that the nut can be tightened securely, however, which creates a solid fit. Usually, the shaft of the bolt is smooth directly below the fitting, as this area is completely within the material being joined and therefore does not require a threaded connection.
The wide head of a round head carriage bolt (sometimes called a cup or mushroom head) is ideal for use with wood because its large size reduces the need for a washer, although a second washer can be added. During the construction of a house, lumber is often held together with one or more round head carriage bolts for outdoor decks and stakes. These round head carriage bolts are often used for wire fences, patios and furniture ready to be assembled, mechanical assemblies, and even automobiles as the square fit prevents the bolt from turning and the round head carriage bolt is a good choice for bolts whose heads are not easily accessible.
When using round head carriage bolts, it is important to choose the proper width and length of the bolt for the application. A bolt that is too narrow may cause the fastener to fail under strain and cause the object to break. If a round head carriage bolt is too large, it may cause stress on the surrounding wood or metal, which can lead to cracks. The thread size of the round head carriage bolt must match the thread size of the round head square neck nut for proper tightening; the thread size varies greatly depending on the application. Length is also important, as the bolt must be long enough to pass through the material being tightened, but not so long that the protruding end becomes a nuisance.
Ningbo yi pian hong Fastener Co., Ltd. was established in 2001, specializing in the production of all kinds of high-strength bolts, nuts, and threaded rods, with an annual production capacity of 30000 tons and an annual turnover of 300 million yuan. Products include ANSI / ASTM, DIN, BS, ISO, GB, JS, and other standards, which are mainly used in the field of high-strength seals and oil pipeline valves.
