Type of Fasteners Used in the Automobile industry

What are the Different Types of Fasteners for High Temperature Applications?
October 23, 2020

As a project manager or engineer, it is imperative that you familiarise yourself with every aspect of the specifications of fasteners required in manufacturing automobiles, and understanding how much torque should be applied. The crucial information regarding tightening, however, is unfortunately rather scarce – this is a vital aspect of automobile fastening that requires further illumination. The fundamentals of employing bolts, and procedures to tighten fasteners, require a comprehensive study.

WHAT TYPE OF FASTENERS ARE ESSENTIAL IN THE AUTOMOBILE INDUSTRY?:

Fasteners used in automobiles are nuts, bolts, and washers. Nuts secure the attachment of bolts and screws to a given surface, and they use interior female threading. Bolts are normally threaded with pins and rods; they are characterised by heads and are employed for constructing the wheel. Washers used in automobiles tend to be small, flat discs with holes at their centre. They are used to hold several automotive bolts in order to prevent leakage, distribute pressure, and secure radiators.

Plastic fasteners, often crafted with vinyl, are manufactured through the process of injection molding, while metal fasteners are normally cold-worked and heat-treated to optimise strength, tightness, and durability. Stainless steel is highly valued as material for automotive fasteners because of its strength and resistance to corrosion.

Vehicle parts often corrode as a result of changing weather conditions; corrosion resistance is an important factor to consider when selecting the material for fasteners. One of the most reliable fastener materials for vehicles is titanium; however, its use is usually restricted to aerospace fastener applications.

THE MOST CRITICAL ISSUE THAT NEEDS TO BE ADDRESSED

The most common type of fastener used in the automobile industry, without a doubt, is the Hex head bolt, closely followed by the hex-headed cap screw and the stud. A stud is a hybrid between a screw and a bolt. If any of the fasteners happen to become loose, the owner is likely to experience problems with his vehicle. For instance, a loose bolt in the engine or in the transmission area can prevent the car from starting, just as unsteady fasteners in the suspension or brake system can lead to extremely dangerous situations like accidents and collisions.

PROPER TIGHTENING SAFEGUARDS YOUR APPLICATION AGAINST RISKS

You should ensure that there is a higher level of tension holding together the head bolts in the critical areas than the fasteners’ load capacity. The joints need to be bound with absolute tightness; insufficient joint tension will result in a combination of force and vibration that serves only to loosen the bolt. On the other hand, an excess level of tension could damage the fastener. Hence, it is important to strike the right balance.

ARE ‘TIGHTENING’ AND ‘TORQUE’ INTERCHANGEABLE TERMS?

The simple answer is no. When we use the term “tightening” with regard to fastener applications, we are referring to the pressure exerted on the parts clamped by the bolt. The fastener stretches, as the extension facilitates adequate tension to hold the automobile’s components together. Torque, on the other hand, refers to the rotational force applied; the screw rotates, with the resulting tension fortifying the assembly.

WHAT AFFECTS THE TENSION RESULTING FROM TORQUE?

To achieve the right amount of tension resulting from tightness, technicians should consider a number of factors. First and foremost, when the torque reflects the fastener’s resistance to rotation; a little bit of lubrication helps the bolt provide the right amount of tension.

An often overlooked element that heightens the fastener’s ability to provide adequate tension is the introduction of a hardened washer. This smoothens rotation; you should make sure that, under no circumstances, the bolt comes loose faster.

PVSIPL Fasteners brings you a wide range of fasteners that are of the highest quality. With our expertise as thought-leaders in the world of fasteners, we assess and understand your specific needs in the automotive industry, providing the most suitable fasteners to ensure that all parts of the vehicles are properly fastened, safe and secure!

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