Fasteners are an essential part of construction, manufacturing, and everyday projects, yet many misconceptions surround their strength, application, and performance. These myths can lead to costly mistakes, improper installations, and even structural failures. In this article, we’ll separate fact from fiction by debunking common fastener myths.

Myth #1: Stainless Steel Fasteners Are Stronger Than All Other Fasteners

The Truth:

While stainless steel fasteners are excellent for corrosion resistance, they are not necessarily stronger than other fasteners. In fact, many stainless steel grades are softer than high-carbon or alloy steel fasteners. Stainless steel is ideal for outdoor and marine applications, but if strength is a priority, consider high-tensile bolts like Grade 8 or structural fasteners.

Myth #2: Bigger Fasteners Always Mean Better Strength

The Truth:

While a larger diameter fastener may seem stronger, strength is determined by material composition, thread design, and application rather than just size. Using an oversized fastener in a poorly designed joint can cause stress concentrations, leading to failure. It’s crucial to select the right fastener type rather than simply increasing size.

Myth #3: All Galvanized Fasteners Are the Same

The Truth:

Not all galvanized fasteners provide the same level of protection. There’s a significant difference between electro-galvanized (zinc-plated) fasteners and hot-dip galvanized fasteners. Electro-galvanized coatings are thin and wear off faster, whereas hot-dip galvanization provides a much thicker layer, making it ideal for outdoor and industrial applications.

Myth #4: You Can Reuse Any Fastener

The Truth:

Some fasteners, especially those used in structural applications or high-torque settings, should never be reused. For example, torque-to-yield (TTY) bolts stretch upon installation and lose their holding strength when removed. Reusing worn or damaged fasteners can compromise the integrity of a structure, leading to potential failures.

Myth #5: Torque Equals Tension

The Truth:

Many believe that simply tightening a bolt to a specific torque ensures the correct clamping force, but torque alone doesn’t guarantee proper tension. Factors like friction, thread lubrication, and surface condition affect the actual tension in a fastener. Using a torque wrench with proper calibration and considering pre-load testing methods ensures accurate fastening.

Knowledge Is Key

Understanding the realities behind these common fastener myths can lead to better choices, safer assemblies, and longer-lasting structures. Whether you’re a professional or a DIY enthusiast, always research and select fasteners based on factual information rather than assumptions. In fastener applications, knowledge truly is strength.