An Overview of the Company's Technical Strength

Handan Guangxuan Fastener Manufacturing Co., Ltd. is located in the Yungang Standard Hardware Industrial Base of Hebei Province, benefiting from the three-dimensional transportation network formed by the Jingguang Railway, National Highway 107, Beijing-Guangzhou-Hong Kong-Macau Expressway, and Qinghong Expressway, achieving efficient logistics distribution. As a local fastener manufacturer with outstanding professional strength, the company has been deeply engaged in the custom processing field for many years, mainly producing a series of high-strength bolts, nuts, and other products. At the same time, it undertakes custom-made business of non-standard and special-shaped fasteners according to customer-provided drawings and samples.

Part II: Technical Analysis of High-Strength Connecting Nuts and Bolts

High-strength connecting nuts and bolts, as critical connection components, directly affect the safety and stability of the equipment. Guangxuan Fasteners are made of alloy steel materials (such as 40Cr, 35CrMoA), and the products achieve a tensile strength of 1000-1200MPa, yield strength ≥900MPa, and hardness range of 28-35HRC through heat treatment processes (quenching + tempering), meeting the requirements of GB/T 3098.1-2010 standard. Their core advantages lie in:

1. Precision manufacturing processUsing cold heading technology, combined with multi-station automatic cold heading machines, to ensure the geometrical accuracy and surface quality of nuts and bolts, thread tolerance grade reaches 6g, and surface roughness Ra≤3.2μm.
2. Full-process quality control systemFrom raw material to finished product, it undergoes 12 quality inspection processes including spectral analysis, hardness testing, tensile testing, etc., strictly controlling the product pass rate to ≥99.5%.
3. Customized service capability：According to customer drawings, adjust bolt length, thread specifications (e.g., M12-M64), performance grade (8.8-12.9), etc., to meet the connection requirements of heavy equipment such as wind turbines, tower cranes, and bridges.

3. Technical Layout and Application Experience

Guangxuan Fasteners focuses on the integration of "industry, academia, and research" in its technological layout. It has established a long-term cooperative relationship with the School of Materials of Hebei University of Technology to jointly develop high corrosion-resistant bolt coating technology (such as Dacromet, zinc-nickel alloy plating), extending the salt spray test time of products to over 1000 hours, significantly enhancing the service life of outdoor equipment. Its technical achievements have been applied to many national key projects.

Case 1: Wind Turbine Tower Connection Project

Project Requirement: Each wind turbine tower requires over 2000 high-strength bolts, with tensile strength ≥ 1040MPa and low-temperature performance (-40℃) meeting standards.

Technical Solution: Selecting 35CrMoA material, adjusting the microstructure through low-temperature tempering process, combined with Dacromet coating treatment, the final product passes the German TÜV certification, successfully replaces imported parts, and reduces the customer's procurement cost by 30%.

Section 4: Practical Guide: Installation and Maintenance of High-Strength Bolts

To ensure connection reliability, Guangxuan Fasteners offers the following practical suggestions:

1. Check before installationEnsure the threads of the bolt and nut are undamaged, and adjust the preload using a torque wrench (e.g., for an 8.8 grade bolt, recommended torque value = 0.7 × nominal diameter² × tensile strength / 1000).
2. Lubrication treatmentApply molybdenum disulfide lubricant to the threaded area to reduce the coefficient of friction and prevent loss of pre-tension.
3. Regular inspectionsEvery 6 months, use an ultrasonic thickness gauge to test the remaining strength of bolts, and replace loose or corroded parts in a timely manner.

V. Technical Parameters Quick Reference Table

Conclusion

Handan Guangxuan Fastener Manufacturing Co., Ltd. has become a benchmark enterprise in the high-strength connection nut and bolt field through continuous technological innovation and strict quality control. Its products are characterized by "high precision, high strength, and high reliability," providing customized solutions for customers nationwide, contributing to the safe operation of industrial equipment.