Automotive fasteners material selection and safety measures

Automotive fasteners material selection and safety measures solution

Automotive fasteners include a variety of loose parts fastening connections to become a vehicle of various standard and non-standard fastening elements, bolts, screws, etc., with the help of threaded fastening connections in the main body.

The number of fasteners accounts for the number of parts of the car far more than any other kind of part. Although automotive fasteners are small, their safety is of great significance. The manufacture and selection of their relationship to the safety of automobile driving should be extremely concerned.

The material selection and safety measures of automobile fasteners are key factors in ensuring the safety of automobile travelers.

Automotive fasteners, including bolts, screws, etc., through the threaded fastening connection are an essential part of the composition of the car. Although these small parts may seem insignificant, their safety is of great significance because the quality of fasteners is directly related to the safety of automobile driving. Therefore, choosing the suitable material and taking the necessary safety measures is vital.

Torx Alloy Steel Socket Head Screws：A Torx-Plus drive has more points of contact than a hex drive, allowing you to tighten these screws with less slippage or damage to the recess. With a tensile strength of 180,000 psi, these alloy steel screws are more robust than Grade 8 steel screws. Their black-oxide finish provides mild corrosion resistance in dry environments. They can be used with both Torx-Plus and standard Torx tools (see Torx bits and Torx keys and drivers). Screws meet ASTM A574 specifications and testing requirements for material quality. Length is measured from under the head.

Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.

Left-Hand Threaded Alloy Steel Socket Head Screws：Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. With a tensile strength of 170,000 psi, these alloy steel screws are more robust than Grade 8 steel screws. Their black-oxide finish provides mild corrosion resistance in dry environments. Length is measured from under the head.

Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.

Screws that meet ASTM A574 comply with specifications and testing requirements for material quality. Screws that meet ISO 4762 (formerly DIN 912) comply with specifications for dimensional standards.

High-Temperature Alloy Steel Socket Head Screws—Grade B7：These screws are specially tempered to meet ASTM A193 specifications for temperatures up to 1100° F. They can be used in high-pressure applications. Length is measured from under the head.

Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.

18-8 Stainless Steel Socket Head Screws： Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.

Black-oxide stainless steel screws have a matte-black finish. Silver-plated stainless steel screws have mild lubricity, so they thread smoothly. Chrome-plated stainless steel screws have a decorative, mirror-like finish.

Metric screws are also known as A2 stainless steel screws.

Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.

Screws that meet ASME B1.1, ASME B18.3, ISO 21269, and ISO 4762 (formerly DIN 912) comply with standards for dimensions. Screws that meet ASTM B456 and ASTM F837 comply with standards for materials.

Mil. Spec. 18-8 Stainless Steel Socket Head Screws： Choose these screws for their adherence to strict military standards for material and construction. Dimensions meet Fed. Spec. FF-S-86 specifications. Screws may be mildly magnetic. Length is measured from under the head.

Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.

Cleaned and Bagged 18-8 Stainless Steel Socket Head Screws for High Vacuum： Cleaned and double bagged in an ISO Class 5 (Fed. Std. Class 100) clean room, these screws are ready to use on chambers and components in high-vacuum systems. 18-8 stainless steel releases gas slower than other metals, allowing your system to achieve higher vacuum levels. Screws are silver-plated for lubricity, reducing wear over time. Length is measured from under the head.

1. Material selection:

Carbon steel is inexpensive and suitable for the general environment but has poor corrosion resistance.

Stainless steel has good corrosion resistance and is suitable for wet and corrosive environments, but the cost is higher.

Alloy steel is high-strength and suitable for high-stress, high-strength connections, but it needs to be paid attention to corrosion.

Plastic and nylon: lightweight, corrosion-resistant, suitable for light load and insulation requirements.

2. Safety measures:

Correct installation and maintenance: The torque must be controlled during installation to ensure that the fasteners are evenly stressed and to avoid overtightening or overlooking. For connections subject to vibration or shock, measures such as anti-loosening nuts, spring washers, or thread adhesive can be used.

Regular inspection: Check the status of fasteners regularly and replace them in time if they are found to be loose or damaged.

In addition, the design and selection of automotive fasteners need to consider various factors, including the design calculation and calibration of threaded joints, stress analysis, preload changes, etc., to ensure that the fasteners can work reliably in a variety of operating conditions. For example, the standard part of VDI2230 is calculated for single-bolt joints, and for the case of multiple-bolt joints, the model needs to be simplified to single-bolt joints for analysis.

Automotive fasteners are vital to the safety of the car.

Fasteners are two or more components will be fastened to become a whole when used in a class of mechanical parts of the general term. Fasteners are used to fasten connections and apply a wide range of essential spare parts. You can see various fasteners in various machinery, vehicles, ships, railroads, bridges, buildings, structures, tools, instruments, meters, and daily necessities. Its application is extensive, with various specifications, performance, and use of different, almost covering people's livelihood and industrial production in various fields, and has a vast market demand. Because it has an irreplaceable fundamental position in the industrial system, so it is figuratively called "the rice of industry".

An essential difference between automotive fasteners and other automotive parts is that they contain hundreds of thousands of different functional varieties and are used in the car for almost all the varioparts of various necessary; automotive fasteners are the sum of many varieties and specifications of automotive fasteners with highly different degrees of importance.

Automotive fasteners are critical. Ignoring the value of small fasteners may lead to hundreds or even tens of thousands of times the value of the loss. Therefore, evaluating the importance of automotive fasteners is necessary to differentiate control and management.

For high-quality Cleaned and Bagged 18-8 Stainless Steel Socket Head Screws for High Vacuum and professional technical support, please get in touch with us at adelajonly@gmail.com or visit our website at https://www.juxinfasteners.com.