A Short Article on Mechanical Fasteners Professionalمنذ شهر - Automobiles - Biskra - 29 الآراء
A mechanical fastener is a device that is used to mechanically join (or fasten or affixes) two or more objects together. In general, fasteners are used to create non-permanent joints; that is, joints that can be removed or dismantled without damaging the joining components.
A welding joint or riveted joint can be termed as a permanent joint, which if required to be removed tends to damage or destruct both the joining components as well as the joint itself.
Mechanical fasteners are usually made of stainless steel, carbon steel, or alloy steel. There are many different types of mechanical fasteners being used in many different industry sectors. Some of them that are extensively being used in the process piping industry will be detailed out in this article.
A washer is a thin plate (typically disk-shaped) with a hole (typically in the center) that is normally used to distribute the load of a threaded fastener, such as a bolt or nut. Washers can also relieve friction, prevent corrosion or leakage, maintain tension and may serve as a spacer. High-quality bolted joints require hardened steel washers to prevent the loss of pre-load due to permanent indentation after the torque is applied. Washers are also important for preventing galvanic corrosion, particularly by insulating steel screws from aluminium surfaces.
Washers can be categorized into three types;
Plain washers, which distribute the load to a relatively larger area minimizing the stress present in the bolt and nut while preventing damage to the surface being fixed.
Spring washers, which have axial flexibility and are used to prevent fastening or loosening due to vibrations.
Locking washers, which prevent fastening or loosening by preventing unscrewing rotation of the fastening device. Locking washers is a type of spring washer.