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Writer's pictureBrittany St. Clair

Types of Fasteners and How They Are Used

You may not think of fasteners as the stars of your assembly line, but without them, nothing stays together. From keeping your machinery running smoothly to holding your equipment in place, these little guys do the heavy lifting—literally. To use fasteners correctly, it's important to understand the different kinds and what they do. Let's take a quick tour of the types of fasteners, how they work, and why they're so essential in manufacturing and engineering.


Types of Fasteners


Bolts and Screws

First up, bolts and screws. Bolts need a sidekick (a nut) to secure things, while screws can get the job done solo. Whether it's a hex bolt, carriage bolt, or lag screw, these fasteners are crucial for building anything sturdy. Let's break them down:

  • Hex bolts: These have a hexagonal head and are often used in construction and machinery. They're high-strength and versatile for holding structural components together—think steel beams in skyscrapers or factory machinery.

  • Carriage bolts: Featuring a rounded head and a square section under the head, carriage bolts are perfect for wood and metal connections, like holding together wooden beams in decks or securing playground equipment.

  • Lag screws: These heavy-duty screws are fantastic for securing large beams in wooden construction projects. You'll find them in everything from log cabins to massive timber-frame houses.


Nuts

Nuts might seem simple, but without them, you can't create a strong joint. Think hex nuts, lock nuts, or the trusty wing nut for more temporary fixes. They hold everything in place, pairing perfectly with their bolt counterparts. They're like the peanut butter to your jelly in the fastener world.

  • Hex nuts: The go-to nut for most general applications—whether holding machine parts together in an industrial setting or building heavy-duty construction frameworks.

  • Lock nuts: You'll find these in machinery with a lot of movement, such as conveyor belts or automotive engines. They prevent loosening caused by vibrations.

  • Wing nuts: Perfect for quick assembly or disassembly by hand—ideal for temporary setups in event staging or equipment that needs regular adjustments.

Washers

Washers are the unsung heroes when it comes to protecting surfaces and distributing loads. Flat washers, spring washers, and lock washers help fasteners hold tight without damaging the materials underneath.

  • Flat washers: These are essential in construction and heavy machinery, ensuring bolts don't sink into surfaces and distribute the load evenly—think bridges or large industrial equipment.

  • Spring washers: Found in automotive and aerospace industries, these washers help absorb vibrations and keep bolts from loosening in dynamic environments.

  • Lock washers: These washers "lock" the bolt or nut in place by exerting pressure against the fastener and its securing surface. You'll find lock washers commonly used in industries like automotive, machinery, and aerospace—where bolts and nuts are subject to constant movement and need extra security to stay tight.


Rivets

Rivets are like the permanent glue of the fastener family. Once they're in, they're in! You'll often find blind rivets or solid rivets holding materials together when you only have access to one side.

  • Blind rivets: These are used in industries like aerospace and automotive, where you may only have access to one side of a material. These expand to hold materials tightly together, keeping things lightweight and secure.

  • Solid rivets: The strongest type, are used in high-stress applications like aircraft assembly where there's no room for failure.



Pins

Next up is pins, where flexibility meets strength. Examples include cotter pins, clevis pins, and dowel pins. If you need to align, lock, or join parts temporarily or semi-permanently, pins are your best friends.

  • Cotter pins: Common in heavy equipment and machinery, these lock clevis pins in place, ensuring rotating parts like crankshafts or levers stay secure.

  • Clevis pins: You'll see these in applications like agricultural machinery or heavy construction equipment, allowing for secure yet flexible connections.

  • Dowel pins: Precision alignment is their specialty, often found in manufacturing machinery to ensure components are perfectly aligned, like gears in an engine.

Clips and Clamps

For all the engineers out there dealing with cables, hoses, or tubes—clips and clamps are the fasteners that keep everything in line. Whether it's a spring clamp or a snap ring, these components ensure everything stays where it's supposed to.

  • Hose clamps: You'll see these in automotive engines or HVAC systems, securing hoses and preventing leaks in high-pressure environments.

  • Snap rings: Often found in gear systems or engines, these rings hold components onto a shaft, ensuring everything runs smoothly without slipping out of place.


Committed to Superior Fastening Solutions

At CSG, we know fasteners aren't just "little pieces of metal"—they're critical components that ensure your projects succeed. From automotive to aerospace, construction to renewable energy, our fasteners meet the highest industry standards for strength, sustainability, reliability, and durability. With a wide range of bolts, screws, nuts, washers, rivets, and more, we've got what you need to keep things secure.


Ready to get started? Connect with our experts or give us a call, and we'll help you find the perfect fastening solution for your next big project. When it comes to keeping things together, CSG has your back.




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