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Understanding the Fundamentals of Aircraft Fasteners

There are many fasteners used in aircraft. Most fasteners are visible during the preflight process. However, some are not visible to the naked eye. In this article, we will learn about the process of liquid honing, Vickers hardness tests, and zinc plating. We will also learn about thread rolled after heat-treating. Understanding the fundamentals of aircraft fasteners will help you recognize which fasteners should be removed before flight.

Liquid honing

Aircraft fasteners typically contain advanced plastics and titanium to withstand corrosion, abrasion, and the high temperatures found in air travel. These parts can reduce aircraft maintenance costs by being lighter than their counterparts. How to identify the hardware distributors on your plane? The specification number represents the part’s manufacturer.

The process is designed to achieve the required finish for precision aircraft fasteners, such as fasteners on commercial and military aircraft. The process involves using a tool with a beam and cap on one side. The weaker side is the one that experiences more bore distortion, so this connection provides an advantage. The process is also characterized by controlled force systems that ensure that the tool never overstresses itself or causes excessive bore distortion.

Vickers hardness tests

The Vickers hardness test for aircraft fasteners determines the strength of a material under a specific load. A Vickers hardness value is a number with an acronym referring to the triangle formed by a diamond indenter. The test measures the amount of force a material can withstand under a given load, usually expressed in kilograms per square millimeter. This number can be converted to several different types of force and is described in pascals. It is important to note that this test is different from HM because it considers the amount of plastic or elastic deformation that a piece can undergo after being indented.

The Vickers hardness test was developed in 1924 and is widely applicable to most materials. Its range of tests is one of the widest of any hardness test. It is governed by the ASTM standard E384 and can measure loads ranging from 1 gf to 120 kgf. Because of its versatility, the Vickers hardness test is a valuable tool for aerospace manufacturers.

Zinc plating

When you think of corrosion-resistant fasteners, you probably think of titanium or beryllium, but the reality is much more complicated. Titanium fasteners are incredibly light and perform exceptionally well under extreme temperatures. In contrast, beryllium fasteners are nearly 40% heavier and far more brittle. While beryllium fasteners do not require any special maintenance, zinc plating greatly increases the corrosion resistance of steel fasteners. In addition, zinc plating leaves a golden or shiny appearance to them, while chromium offers excellent corrosion resistance. But be warned: zinc coating thickness is directly proportional to the amount of zinc material present on the parts.

The disadvantage of zinc plating for aircraft fasteners is that it can cause hydrogen embrittlement. This is a condition in which trapped hydrogen weakens the metal and causes it to crack. The zinc must be baked after plating to diffuse hydrogen throughout the metal to combat this issue. This process takes three hours. In addition, Paulo’s Murfreesboro division offers in-house salt spray testing.

Thread rolled after heat-treating.

A thread rolled after heat-treating in aircraft flanges is ten to twenty percent stronger than one produced using a ground or cut thread. Threads produced with rolled threads also have higher fatigue resistance, and there is no waste of stock during the forming process. The rolled threads are also more wear-resistant, as the surface is more complex than the cut or ground thread.

A thread rolled after heat-treating is a standard process used in aerospace fasteners. It extends the fatigue-resistance of threaded elements by introducing residual compressive stress during the process. Thread rolled fasteners can assemble connecting rods, cylinder heads, and main bearings in aircraft. Their high workforce makes them suitable for these high-stress applications.

Self-locking aircraft “jet nuts.”

Self-locking aircraft “jet nuts” are a type of bolt designed for tight quarters, such as on aircraft. These nuts are lightweight, compact, and highly durable. They are commonly used in high-stress applications and are often preferred over conventional locknuts because of their lower weight and smaller profile. However, despite these advantages, these nuts lack a warranty or traceability. 

Self-locking aircraft “jet nuts” feature a locking mechanism that activates when a bolt is tightened. A surface-bearing locking nut can rotate freely under normal conditions but is usually compressed against a bearing surface to activate the locking mechanism. Locking aircraft nuts can come in many subsets and models suited to various applications. However, unlike other aircraft nut styles, it is designed with a self-locking mechanism. Despite the name, this nut is self-locking, and its self-locking mechanism ensures that it will stay securely in place once it is fully tightened.

How to Pass an Emergency Scene Safely

How to Pass an Emergency Scene Safely

Have you ever suddenly come upon an emergency scene while driving? While accidents can be a frequent sight on the road, it’s common to be a little confused about what to do to get around one safely. No two accidents are the same and navigating each one can be challenging. If you follow a few simple rules you can get through them with minimal problems and continue on your way.

The emergency responders at an accident scene will be focused on helping the people involved. They have received training from an academy run by a clinical coordinator Staten Island NY on how to help victims, and how to work around dangerous situations like moving traffic.

How to Pass an Emergency Scene Safely

The first thing you can do to keep things moving is to be aware of the road around you. The sooner you are aware of a slowdown ahead, the sooner you can react. If you see flashing lights or slow traffic, extra time to make changes can avoid problems. Being aware of other vehicles lets you plan for lane changes if needed.

Once you see an emergency ahead, slow down safely, but don’t stop unless you either have to, or are directed to do so by an emergency worker. It is human nature to want to look at what’s happening, but this can be dangerous. Other drivers may continue at a higher speed, and this can cause another accident. Continuing to drive at a similar speed to other vehicles is the safest plan.

Maybe the most important thing you can do when driving through an emergency scene is look out for responders. Often they will be directing traffic, and following their directions will keep you and everyone around you safe. Other times they may have to move quickly around moving traffic, and being aware of them will protect them and the people they are helping.

While traffic accident scenes can be chaotic, these steps can help keep everyone moving and safe. Being aware of your surroundings, following directions, and being mindful of other drivers can make a confusing scene manageable.

What to Do When Your Big Rig Breaks Down

What to Do When Your Big Rig Breaks Down

If you’re driving a big rig, being forced to pull over because of vehicle issues can put you hours behind schedule. Follow these tips to minimize problems and get yourself back on the road quicker.

What to Do When Your Big Rig Breaks Down

Service Your Truck

The first order of business is to try to prevent problems. Keep your truck up to date on inspections and be sure to take a look under the hood if you plan on taking a particularly long route. A follow-up inspection afterward might seem like overkill, but it will cut back on inconvenient surprises.

Plan Your Route

With how popular smartphones are, it’s easy to find service providers anywhere, no matter what your need. However, service dead zones are still an obstacle, and it’s possible you might travel somewhere you don’t have coverage. Map out dead zones ahead of your trip as well as appraise yourself of rest stops, big rig towing Anderson CA and other services inside of them that you may need.

Evaluate Your Surroundings

Be mindful of traffic, especially if there isn’t much of a shoulder to pull off on. If possible, take the nearest off-ramp and park there. Low visibility and adverse road conditions caused by bad weather should also be taken into consideration if you must exit the cab.

Signal the Problem

You want other drivers to be aware your truck is there, so put on your flashers and use road flares if you have them. The latter should be spaced every 50 feet away from your truck toward oncoming traffic. 

Get in Touch

As soon as you pull over, call your dispatcher to inform them of the issue. Don’t try to sweep things under the rug, as not having the proper advice and assistance may cost you more time and resources than asking for help.

Being a reliable truck driver doesn’t just mean being on time, it means being responsible. A breakdown is preferable to an accident, so don’t ignore issues when they arise.