Fasteners
Special grades of fasteners are specially manufactured as they are resistant material well suited for services in extreme environments. These materials are also effective against temperature and pressure services such as pressure vessels, valves and flanges. Fasteners are mechanical devices that form non-permanent or semi-permanent mechanical couplings between two objects. This type of coupling varies from welding, gluing, or cementing in that fasteners employ mechanical forces rather than chemical bonding and/or heat to hold two pieces together. Fasteners are classified into the following categories:
- Screws are mechanical fasteners that employ external threads to hold materials together. They are multipurpose tools because they are easy to use, rarely require extra components, and exist in a wide range of shapes and sizes.
- Anchor bolts are often used to anchor columns or other supports to a foundation or for construction and in attaching traffic signal poles because they provide a robust attachment with little tolerance for errors.
- A stud bolt is a mechanical un-headed fastener with a fully or partly threaded body that can bind two nearby objects or surfaces with extra hardware (nut). Unlike many other types of bolts, this one is passed entirely through rather being pushed into an item or surface.
- A washer is a thin plate with a hole in the center that is often used to spread the weight of a threaded fastener, such as a screw or nut. Hardened steel washers are required in high-quality bolted joints to minimize pre-load loss due to Brinelling once torque has been applied.
- Hexagon shape bolts with partial or complete threads with standard or non-standard thread lengths using cold & hot forging processes in various sizes & lengths, Hex bolts are adjusted with a wrench and are used to join metal parts are named for the six sides on the bolt head and these bolts are utilized in practically every industry notably in building & construction sectors.
