Beginning Carriage Bolts 101

Carriage bolts are round headed bolts used mainly for timber as they are threaded

along parts of their shanks, and are inserted into already pre drilled holes; unlike screws which are driven into objects without a hole. These bolts normally have domed heads and square necks that pull into the wood when the nut is tightened. Although most carriage bolts are round headed with square shafts, some are also available with no necks. These bolts are often seen in regular household furniture. The bolt's collars fit into holes or are twisted into wood to prevent the bolt from turning when the nut is tightened.

Carriage bolts are often coarse threaded which are available in a 3/4 diameter, and a 1/2 inch length. These rods are infused with spiral threads and a head which includes a neck to avoid rotation. These then allows a nut to be connected to one end while the bolt is firmly secured in place. Carriage bolts are usually manufactured from metal with different types of necks in different sizes. Sometimes referred to as plow bolts, these bolts are sunk into the cradle, gluing the felt padding into the cradle cavity. In order to secure two or more beams together, a carriage bolt must pass through all of the said beams and should be fastened at the end.

Carriage bolts in essence are fasteners with helical ridges called external threads wrapped around its cylinder. These threads are made to mate with internal threads in the form of a nut which complements its form and function. Some threads are designed to cut helical grooves in softer materials when the bolt is inserted. Carriage bolts are used to hold and position objects together. The head of a carriage bolt is a specially formed section which allows it to be turned and inserted.

There are several tools used for carriage bolts which include wrenches and screw drivers. A carriage bolt's head must be larger than its body to keep it from going deeper into the objects surface; but of course, carriage bolts' heads are domed which means that they cannot be driven in - much like set screws which have smaller heads and J bolts which do not have heads and therefore can't be driven. A shank is the cylindrical portion of a bolt from the underside of the head going to its tip.

Majority of screws are secured by turning them clockwise, unlike carriage bolts; though there are some which are tightened counter clockwise - these are called left hand threaded screws. Carriage bolts re different form screws in that they are threaded fasteners used for insertion through pre drilled holes in assembled parts, and are tightened by torquing a nut; while a screw is externally threaded capable of being driven into holes in assembled parts by mating with an internal thread, and which are tightened or released through its head. Furthermore, carriage bolts are externally threaded fasteners which are prevented from turning by tightening their nuts.

by: Gary Hall

POST COMMENT

Makereservations For The Low-cost Room And Board Plus Carriage To Enjoy An Pleasant Vancouver Vaca Settle For One Of The Marked Down Lodging Including Carriage To Have One Of The Enchanting Package V Early Miscarriage Causes The Revolution Of Carriage Bolts What Are The Main Causes Of Miscarriage, And How Can They Be Avoided? Miscarriage of Justice - Bhopal Gas Tragedy The Noisy Carriage: The Greatest Train-Related Songs Which Came First? The Carriage Or The Bolt?