The American Society of Mechanical Engineers (ASME) publishes several Standards on fasteners. Standards & traceability ASME B18 standards on bolts, nuts, rivets, screws, washers, and similar fasteners
rubber band (or bands of other materials). Environment, including temperature, water exposure, and potentially corrosive elements. Factors that should be considered include: When choosing a fastener for a given application, it is important to know the specifics of that application to help select the proper material for the intended use. Common coatings/platings include zinc, chrome, and hot dip galvanizing. In many cases, special coatings or plating may be applied to metal fasteners to improve their performance characteristics by, for example, enhancing corrosion resistance. Titanium, aluminum, and various alloys are also common materials of construction for metal fasteners. The major grade used in stainless steel fasteners: 200 series, 300 series, and 400 series. There are three major steel fasteners used in industries: stainless steel, carbon steel, and alloy steel. The threading, the applied load on the fastener, the stiffness of the fastener, and the number of fasteners needed should all be taken into account. When selecting a fastener for industrial applications, it is important to consider a variety of factors. The largest distributor of fasteners in North America is the Fastenal Company. More than 200 billion fasteners are used per year in the U.S., 26 billion of these by the automotive industry. The industry is strongly tied to the production of automobiles, aircraft, appliances, agricultural machinery, commercial construction, and infrastructure. In 2005, it is estimated that the United States fastener industry runs 350 manufacturing plants and employs 40,000 workers. 3.1 ASME B18 standards on bolts, nuts, rivets, screws, washers, and similar fasteners. Welding is an example of creating permanent joints. In general, fasteners are used to create non-permanent joints that is, joints that can be removed or dismantled without damaging the joining components. For the ride-sharing company, see Fasten (company).Ī fastener is a hardware device that mechanically joins or affixes two or more objects together. This article is about the mechanical device. 
Likewise, hinges and springs may join objects together, but are ordinarily not considered fasteners because their primary purpose is to allow articulation rather than rigid affixment.
metal wire, possibly coated with plastic, or multiple parallel wires kept together by a plastic strip coating), cable, chain, or plastic wrap may be used to mechanically join objects but are not generally categorized as fasteners because they have additional common uses. There are also special-purpose closing devices, e.g. Fasteners can also be used to close a container such as a bag, a box, or an envelope or they may involve keeping together the sides of an opening of flexible material, attaching a lid to a container, etc. Some types of woodworking joints make use of separate internal reinforcements, such as dowels or biscuits, which in a sense can be considered fasteners within the scope of the joint system, although on their own they are not general purpose fasteners.įurniture supplied in flat-pack form often uses cam dowels locked by cam locks, also known as conformat fasteners. The use of force may also be used, such as with magnets, vacuum (like suction cups), or even friction (like sticky pads). Other alternative methods of joining materials include: crimping, welding, soldering, brazing, taping, gluing, cementing, or the use of other adhesives. A fastener is a hardware device that mechanically joins or affixes two or more objects together.
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