Hanging Board Hex Bolt is a heavy-duty hexagonal head bolt designed for hanging panels (such as insulating panels in power equipment, mounting panels in communication equipment, ceiling panels in buildings, etc.). Its core function is to provide strong vertical load-bearing capacity and reliable fastening connection to ensure that the suspended panels remain stable under various environmental conditions. This type of bolt usually has a longer bare rod portion (unthreaded rod body) to facilitate passing through the panel and bearing shear force, and is used with hexagonal nuts and washers to achieve a firm mechanical connection. Handan Jinmai's products strictly comply with relevant industry standards to ensure their excellent mechanical properties and long-term service reliability.
1. Excellent bearing strength: Made of high-quality carbon steel or alloy steel, after precise heat treatment (such as quenching and tempering), it reaches high strength grade (such as grade 8.8, grade 10.9), provides excellent tensile strength and yield strength, and can easily cope with the heavy load requirements of hanging plates.
2. Reliable anti-loosening design: Precision-rolled standard threads (usually coarse or fine pitch), with suitable nuts, can effectively resist loosening caused by vibration and load changes, and ensure the long-lasting stability of the connection.
3. Excellent corrosion resistance: Provide a variety of surface treatment options, such as hot-dip galvanizing, Dacromet, mechanical galvanizing, etc., to form a dense protective layer, significantly improve the corrosion resistance of bolts in harsh environments such as outdoor humidity and salt spray, and extend service life.
4. Accurate size and tolerance: Strictly produced in accordance with international (such as ISO, DIN, ANSI/ASME) or national standards (such as GB), to ensure accurate control of thread accuracy, head size, rod diameter and length tolerance, and achieve perfect interchangeability and smooth installation.
1. Raw material selection: Strictly select high-quality round wire that meets the standard requirements to ensure that the chemical composition and mechanical properties meet the standards.
2. Cold heading: Using a high-precision cold heading machine, the wire is extruded through multiple dies at room temperature to efficiently and high-quality produce the head (hexagonal head) and preliminary rod shape of the bolt. This process can improve the density and strength of the material.
3. Thread processing (rolling): Using a high-precision thread rolling machine, precise and smooth threads are processed on the rod through a cold rolling process. Rolling can strengthen the thread surface and improve fatigue resistance.
4. Heat treatment (quenching and tempering): The bolts are quenched and tempered at high temperature, and the temperature and time are precisely controlled to significantly improve their core mechanical properties (tensile strength, yield strength, toughness) to achieve the required strength grade (such as grade 8.8).
5. Surface treatment: According to customer needs and application environment, corresponding surface treatment is carried out:
Hot-dip galvanizing: provides a thick zinc layer, sacrificial anode protection, suitable for most outdoor environments, and has a long anti-corrosion life.
Dacromet/chrome-free zinc-aluminum coating: environmentally friendly coating, providing excellent corrosion resistance, heat resistance and no risk of hydrogen embrittlement.
Mechanical galvanizing: suitable for high-strength bolts, avoiding hydrogen embrittlement problems and providing good anti-corrosion protection.
Others: such as blackening, phosphating, etc.
6. Strict quality inspection: Throughout the entire production process, a full range of inspections such as dimensional accuracy, thread go and no-go gauge, surface quality, hardness, tensile strength, guaranteed load, torque test, coating thickness and adhesion are carried out to ensure 100% compliance.
7. Packaging and warehousing: Use moisture-proof and rust-proof packaging methods (such as plastic bags + cartons/woven bags), clearly mark product specifications, quantities, batches and standards, and store them properly in dry warehouses.
Implementation standards: It can meet mainstream standards such as GB/T (national standard), ISO (international standard), DIN (German standard), ANSI/ASME (American standard). Common standards such as GB/T 5782 (hexagonal bolts), or customized according to specific applications.
Material: high-quality carbon steel (such as SWRCH35K, SWRCH45K, ML35, ML40) or alloy steel (such as 35CrMo, 40Cr, B7). Ensure excellent performance of the base material.
Strength grade: Common grades are 8.8 and 10.9. Grade 8.8 means the minimum tensile strength is 800 MPa and the minimum yield strength is 640 MPa; Grade 10.9 means the minimum tensile strength is 1000 MPa and the minimum yield strength is 900 MPa.
Surface treatment:
Hot-dip galvanizing: average zinc layer thickness ≥ 55 μm (common requirement), in line with relevant standards.
Dacromet: The coating thickness is usually 5-12 μm, and the salt spray resistance test time is ≥ 500 hours (red rust) or even higher.
Mechanical galvanizing: The zinc layer thickness can be customized (such as 30-50 μm), and there is no hydrogen embrittlement.
Hanging Board Hex Bolt is a key component for connection and suspension. Its performance and quality are directly related to the safety and durability of the entire structure. Choosing the products of Handan Jinmai Fastener Manufacturing Co., Ltd., you will get: reliable quality, professional solutions, strong manufacturing strength and reliable partners. We are well aware of the "small bolts, big responsibilities", and will continue to provide solid connection guarantees for your infrastructure construction and safe operation of equipment with an attitude of excellence.
Official website: https://www.jinmaipowerline.com/
Email: [email protected]
Contact: WhatsApp/wechat: +86 13831001495
We have recommended some of our Related products to you. I hope you will be interested.
