Upgrade Of Fastener Structure: Latest Market Conditions And Technological Advancements in Steel Fine-thread Phosphated Screws Industry

Recently, the demand for steel fine-thread phosphating screws in the precision fastening field has continued to rise, becoming the core basic components in industries such as new energy vehicles, high-end equipment, aerospace, etc. Driven by standard upgrades, process iterations, and environmental protection policies, this category is upgrading from traditional general parts to high precision, high reliability, and green directions. The market structure and technical routes are showing a clear transformation trend.
The fine-thread thread has significant advantages in vibration conditions and precision assembly scenarios due to its small pitch, thin tooth profile, strong self-locking ability, and uniform stress distribution. Since 2026, the proportion of fine-thread fasteners in the high-end manufacturing field has steadily increased. Among them, steel fine-thread phosphating products have become the mainstream choice for 10.9 grade and above high-strength connections due to their balance of precision, corrosion prevention, and assembly stability. Phosphating treatment forms a porous phosphate crystal film on the steel surface through chemical transformation, with a thickness typically controlled at 2–8 μm. This can enhance coating adhesion, stabilize torque coefficient, avoid hydrogen embrittlement risks, and is particularly suitable for the strict requirements of fine-thread threads for dimensional accuracy.
Industry standard updates have driven the improvement of product quality. The new version of the GB/T 5786 fine-thread bolt standard was recently released, detailing indicators such as phosphating film thickness, salt spray performance, and surface defects, and clearly defining the acceptance boundaries between A-level precision grade and B-level ordinary grade. This forces enterprises to upgrade testing and process control. At the same time, environmental protection policies accelerate process iterations, and traditional high-energy consumption phosphating is gradually being replaced by normal temperature rapid zinc-based, low-nickel-manganese-based, and nano-composite phosphating. New phosphating processes ensure a salt spray of 72–120 hours while reducing wastewater discharge and energy consumption, meeting RoHS and REACH regulations, and supporting the compliance of export products.
The market demand side shows structural growth. Steel fine-thread phosphating screws are widely used in parts such as electric drives, chassis, and battery packs of new energy vehicles to ensure connection reliability in long-term vibration environments; photovoltaic and wind power equipment have higher requirements for corrosion and weather resistance, and phosphating + closed oil composite treatment has become a standard; the popularization of automated production lines has driven screws to upgrade in terms of torque consistency and batch-to-batch stability, and the uniformity of the phosphating film directly affects the qualification rate of assembly. According to industry data, the proportion of high-end phosphating fasteners in the market increased to 28% in 2026, and leading enterprises increased the yield rate to 99.2% through full-process automation, while small and medium-sized enterprises face pressure from environmental protection investment and technological iteration, and industry concentration continues to increase.
Technological innovation focuses on performance and green synergy. Nano-modified phosphating has enabled fine-thread screws to exceed 120 hours of salt spray resistance and increase shear strength by 20%; the non-phosphorus silane conversion technology has been piloted in high-end new energy scenarios, providing a direction for long-term low-carbon transformation; online film thickness monitoring, intelligent temperature control, and counter-flow rinsing equipment have been popularized to achieve a water resource utilization rate of over 75%. In addition, the quality of high-quality carbon steel and alloy steel wire rods has been improved, with sulfur and phosphorus impurities controlled below 0.005%, and combined with precise quenching processes, it significantly improves the tensile and fatigue resistance of fine-thread threads, extending service life.
Currently, the steel fine-thread phosphating treatment screw industry has entered a high-quality development stage. Tighter standards, demand upgrades, and environmental protection pressure have become the long-term main lines. Enterprises need to continuously break through in three aspects: thread accuracy, film layer control, and process traceability, layout automated and digital production lines, and expand high-end scene certifications. In the future, with the acceleration of domestic manufacturing of high-end products and the deepening of green manufacturing, fine-thread phosphating fasteners with precision, reliability, and economic performance will maintain high growth, becoming an important growth point for the structural upgrading of the fastener industry.