As there are a wide range of fastener types available on the market, figuring out all their slight variations can be difficult. Fasteners also differ according to use and application, meaning that while some fasteners work optimally for heavy-duty use, others may only work well for smaller, less demanding projects. In this blog, we will go over various types of fasteners and their unique features.
 
Permanent v. Temporary Fasteners
 
To begin, there are two major categories under which all fasteners fall: permanent and temporary.
 
Permanent fasteners are generally single-use, are meant to join two materials, and cannot be removed once they have been installed. They are utilized in an array of industry verticals, including automotive and consumer electronics, and some of the most common permanent fasteners are rivets, nails, and welds.
 
Rivets are permanent fastening solutions that allow users to join larger, flatter materials like metal sheets or plates. For example, solid rivets serve as the most common type, consisting of a solid shaft and a head on one side. The side without the heat is often deformed using a rivet gun to create a solid hold. Moreover, solid rivets are frequently used in applications where safety and reliability are critical. Other common types include blind rivets and tubular rivets.
Nails are small metal fasteners often found in woodworking and construction.
Welds are used to produce strong, permanent connections between steel and the fastener.
 
Temporary fasteners are manufactured to join two materials or objects, and they can be easily removed or reused without damaging the objects they hold together. Popular examples of this type of fastener are bolts, screws, studs, nuts, and washers.
Externally-threaded fasteners are distinguished by their externally-threaded profile. As such, bolts, screws, and studs fall under this subcategory.
  • Bolts are mechanical fasteners with an external male thread that require a matching pre-formed female thread, such as a nut.
  • crews are made of metal and they have a helical ridge called a male thread.
  • Studs are used to join two materials through internal threads on each component. More than that, they lack a head and are threaded on each side.
Nuts can be used alongside a bolt to assemble multiple components together. Of all their varying types, hexagonal nuts are most popular. Hexagonal nuts utilize the object to generate friction, keeping them securely in place. However, there are also lock nuts, shear nuts, and wing nuts.
Washers are used with nuts and bolts to better distribute the force load for durability. Like their counterparts, washers are made in numerous types, such as flat, spring, cup, and repair washers. Flat washers are the most common, those which evenly distribute loads during the tightening process.
 
How Fasteners Are Used in the Aviation Industry
 
In the realm of aircraft construction and repair, fasteners are utilized to join multiple parts together into assemblies. Generally, fasteners used for aircraft must adhere to strict standardization objectives outlined by the Federal Aviation Administration (FAA), ensuring that they are airworthy and safe for implementation on aircraft. As aircraft are subjected to a wide range of stressors and operating environments, the type of fastener used is critical. More than that, fasteners that may be utilized for blades or rotors may not be suitable for use near the motor or engine. That being said, selecting the right type of fastener for your aircraft is probably one of the most important decisions you will make; thus, having professionals to guide you can help the process go smoothly.
 
Simplified Purchasing is a leading distributor of fasteners, all of which have been sourced from top global manufacturers on our Approved Vendor List (AVL). Browse our expansive listings and take note of any items that spark your interest. For more information on any particular part number, fill out and submit a Request for Quote (RFQ) form. When filling out a form, we ask that you please include your part requirements like target prices, operational deadlines, and desired quantities. If you have additional questions about our other offered services, contact one of our expert team members directly to learn more today!


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With a myriad of industries relying on fasteners to secure part types and machinery, there are countless types of fasteners available on the market. These include nuts, bolts, screws, and all of their subtypes of specialized designs, such as the focus of this blog: sealing fasteners. Sealing fasteners are unique in their ability to protect contaminants from entering a system. With high-tech properties and reliability across many applications, sealing fasteners are a staple of the military and aerospace sectors, finding use in fuel pumps of jet and rocket engines, satellite equipment, and more. For your better knowledge, we will explore the functions of these specialized fasteners and some examples of typical use.
 
Sealing fasteners can be any type of fastener, meaning a nut, screw, bolt, or other fastener type may contain the parts needed to perform a sealing function. The working principle of sealing relies on the use of a rubber O-ring part type or other rubber element, typically situated in the groove under the head of a screw or the face of a nut.  When squeezed, this element permanently seals out contaminants. This reliable seal protects against both solids and fluids, keeping applications safe from disinfectants, oil, gas, humidity, dust, moisture, debris, or chemicals. Furthermore, fastener seals also prevent the leakage of toxins out of machinery and devices into the surrounding environment.
 
The rubber component of sealing fasteners are the key to their fool-proof design. Although other rubber components are occasionally used, an O-ring is typically squeezed to provide a 360 degree hermetic seal. Under the head of a screw or related part, the O-ring sits in a groove so it is surrounded by metal on all sides, prolonging its life under pressure and ensuring it will not crack or break. Both the metals and rubbers used in sealing fasteners vary by intended use. For example, silicone rubber is popular for its ability to withstand temperatures ranging from 62° to 204° C, while a Buna-N compound is better for applications that require petroleum resistance.
 
Sealing fasteners are beneficial for applications where components must withstand harsh weather conditions and extreme atmospheres and temperatures. For this reason, they are also reliable components for military and aerospace applications. Military-grade sealing screws and O-rings that meet the requirements of the Military Standard Parts MS3212/MS3213/NASM 82496 and are pressure-tested to 1500 psi are available through select manufacturers. Additionally, they are made from corrosion-resistant materials, making them easy to clean. As such, they are often used in medical applications, ranging from laser scopes and surgical robots to kidney dialysis machines. Sealing fasteners also find home in a variety of other high-demand applications, including those with exposure to Arctic temperatures and electricity.
 
Whether you require screws, nuts, bolts, washers, or any other type of aircraft fastener, allow Simplified Purchasing to be your procurement partner. Owned and operated by ASAP Semiconductor, we are an AS9120B, ISO 9001:2015, and FAA AC 00-56B accredited enterprise with a strict No China Sourcing policy. As such, you can rest assured that our inventory of over 2 billion new, used, obsolete, and hard-to-find part types is of the highest caliber. Offering rapid lead times and competitive cost savings, browse our inventory as you see fit until you locate a part that piques your interest. Then, kick off the procurement process by submitting a Request for Quote (RFQ) form to receive an Instant Quote within 15 minutes or less. In order to receive the most custom response, be sure to include all relevant details in your form regarding your purchase, such as target prices or shipping deadlines. To learn more, contact us at any time!


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When it comes to any vehicle including an aircraft, securing hardware is a primary task that needs to be done for safety. Loose hardware wiring can be a cause of tragic accidents and threaten many lives. As a result, it is crucial to secure the aircraft’s bolts and fasteners with safety wires to prevent accidents. Furthermore, one should always check such assemblies often to confirm whether they are tight and ready before take-off.


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Roller bearings are mechanical components that support connecting and rotating shafts to help with movement and mobilization within machinery. Essentially, thesy are metal elements utilized to reduce friction and are equipped to handle radial, axial, and thrust loads. Moreover, they are found in a wide range of applications from the motor industry to home appliances, making them incredibly versatile devices. As such, there are different types of roller bearings available on the market, some of which we will outline in this blog.
 


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Bearings of any type are not ever-lasting components. Over time, they experience wear, corrosion, and other forms of degradation depending on the applications in which they are installed. However, it is not common for them to fail without reason. Consisting of a donut-shaped piece of material, bearings are intended to restrict or limit the motion of a machine’s moving parts while simultaneously reducing friction between such parts.
 


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In the world of fasteners, nuts are one of the most common types of hardware used for assembly. Typically, nuts are paired with a correlating screw or bolt, twisting onto the tail-end of the component to hold two or more objects together with compression. Depending on the application in question and the types of materials being used, there are a number of nut types that one may take advantage of. One notable option is the wing nut fastener, that of which is distinguishable by its large metal wings that extend outward from the circular component. Wing nuts are popularly used in applications where tightening and removal are done by hand, and they are used in projects small and large. To help you determine whether the wing nut is the right type of fastener for you, we will discuss its characteristics in more detail!
 


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Propeller blades are similar to aircraft wings, with cambered and flat sides, chord lines that run throughout the blade length, and leading & trailing edges. Aircraft propulsion generated by rotating propellers requires the use of a highly complicated mechanism since the propeller takes on the features of a rotating wing. There are differential aerodynamic properties between the top and bottom of the propeller blades. Propeller blades tend to be long and thin, and because of their rotation, the speed of the blade tips tends to be faster than that of the near-hub sections. Consequently, analyzing the differential airflow generated around the rotating blades becomes difficult. This blog aims to deconstruct the complex working mechanism of propeller propulsion into a more simplified explanation for ease of understanding. 


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A fastener is a device used to mechanically connect two objects. Examples include screws, nails, nuts, bolts, washers, anchors, and rivets. They are not permanent in that they can be unscrewed, loosened, and taken apart. The advantage of fastening two objects together rather than welding them is that the separate components can be replaced and maintained more easily. Different fasteners provide different amounts of strength, but there is also more to consider when purchasing fasteners for varying applications.
           


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A shaft bearing is a common mechanical component, often placed within assemblies to bear applied loads while facilitating the rotational or sliding movement between parts. With their general, yet important, role, shaft bearings commonly find use in a wide variety of applications ranging from industrial machinery to aerospace vehicles. To accommodate a diverse set of industries and needs, shaft bearings come in various types and designs, each varying in its qualities and characteristics.
 


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In general, bearings are specialized components that assist an object’s rotation. Typically supporting the shaft that rotates inside machinery, bearings are found in automobiles, aircraft, electric generators, and more. As they find countless uses, bearings are available in varying types, one of which is called a rolling bearing.
 


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