The Types of Metal Fasteners

The Types of Metal Fasteners

The Types of Metal Fasteners

Generally speaking, metal fasteners are divided into 2 types: permanent fasteners, and non-permanent fasteners. Screws, nuts and bolts, rivets, retaining rings and clamps are examples from the first category. Non-permanent fasteners include quick-release couplers and clamps intended for removal at a specified time and pins, which allow relative movement of fastened parts.

Here are some advantages of both permanent and non-permanent metal fasteners:

Permanent fasteners:

Reduce damage to painted surfaces

Work better with surfaces that need to fit more closely

Eliminate corrosion usually associated with mechanical fasteners

Reduce panel "dimpling"

Fewer stress points from holes drilled to accommodate bolts and screws

Non-Permanent fasteners:

Connected materials can be shifted or changed

Worn or broken fasteners can be more easily replaced

Connections can be broken when needed

Metal fasteners must be strong to bear significant loads. In many cases they can be manufactured by powder metallurgical or casting techniques. Iron is a constituent of many types of metal fasteners, although titanium increasingly is coming into use in applications where strength must be balanced against light weight. In most applications where permanent bonding is required metal fasteners are replaceable by some form of welding or soldering.

Also, metal fasteners can be separated into light duty fasteners and heavy duty fasteners: light duty metal fasteners are great for bags, straps, military/tactical items, pet collars and leashes, medical products, marine and diving items, tent and awning applications, equine items, and firefighter products. Most items are nickel plated and come in various sizes depending on the webbing being used. Black and military plating are also available. Various items are mil-spec. Heavy duty metal fasteners like ratchets, cam buckles, and hooks are designed for aircraft and vehicle cargo applications like tiedowns and restraints.

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