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High-precision metal screw components engineered specifically for solenoid valve assemblies, delivering superior clamping force, corrosion resistance, and dimensional accuracy.
(formerly Yueqing Feilong Instrument Factory) was established in September 1999 and is located at the Oujiang Port of Wenzhou City. It has complete production, processing, grinding and other departments as well as other departments. It mainly engages in the integrated manufacturing and sales of various electrical switches, shafts, plastic products and hardware components.
The products are widely used in home appliances, solenoid valves, electronics, automobiles, filtration equipment and other fields. With strict quality management from raw material procurement to finished product shipment, we have earned the trust of over 208 enterprise clients worldwide.
View MoreMetal screws for solenoid valves are far more than simple fasteners — they are precision-engineered components that determine the structural integrity, operational reliability, and service lifespan of fluid control systems across virtually every industrial sector. As solenoid valve technology advances, so too does the demand for higher-performance metal screws capable of withstanding extreme pressures, temperatures, and corrosive environments.
Metal screws used in solenoid valve assemblies are specialized fasteners designed to secure valve bodies, coil housings, mounting brackets, end caps, and core tube assemblies. Unlike standard fasteners, these screws must maintain precise clamping torque under cyclic electromagnetic actuation, fluid pressure fluctuations, and thermal expansion cycles. Common materials include stainless steel (304/316), carbon steel with zinc or nickel plating, brass, and titanium alloy — each selected based on the medium being controlled, operating pressure, and environmental exposure.
The global solenoid valve market was valued at over USD 4.2 billion in 2023 and is projected to exceed USD 6.5 billion by 2030, driven by accelerating industrial automation, smart manufacturing initiatives, and the rapid expansion of clean energy infrastructure. Within this ecosystem, metal screws and precision fasteners represent a critical sub-segment. Industrial buyers increasingly specify custom-engineered screws rather than off-the-shelf fasteners, as valve OEMs demand tighter tolerances (often ±0.01mm), consistent surface finishes, and traceable material certifications to meet international standards such as ISO 9001, RoHS, and REACH compliance.
Smart factories and Industry 4.0 deployments are multiplying solenoid valve installations globally, directly increasing demand for precision metal screws with tighter dimensional tolerances and enhanced fatigue resistance.
Hydrogen fuel cell systems, EV battery thermal management, and renewable energy storage all rely on solenoid valves — and consequently on corrosion-resistant metal screws capable of operating in hydrogen or coolant environments.
Manufacturers are shifting toward lead-free brass alloys, duplex stainless steels, and surface treatments like passivation and PVD coatings to meet environmental regulations while extending component service life by 40–60%.
Designing metal screws for solenoid valve applications requires a fundamentally different engineering approach compared to general fasteners. The following technical parameters are critical in specifying the right screw for each application:
Thread Form & Pitch: Metric (M2–M12) and UNC/UNF threads are most common; fine-pitch threads provide superior vibration resistance in high-cycle valve applications. Material Grade: A2-70 stainless steel is standard for water and steam valves; A4-80 (316 SS) is preferred for chemical and marine service. Head Type: Socket head cap screws (SHCS) dominate valve body assemblies due to their high torque capacity in confined spaces. Countersunk variants are used where flush mounting is required. Surface Treatment: Zinc-nickel plating, passivation, Dacromet coating, or PTFE dry-film lubrication are applied based on the corrosion class of the operating environment. Torque Specification: Solenoid valve screws must be torqued to precise values to prevent both leakage (under-torque) and thread stripping or body cracking (over-torque).
Metal screws in solenoid valve systems serve diverse and demanding roles across multiple industries. Understanding these application scenarios helps engineers and procurement specialists select the optimal fastener specification.
In municipal water treatment plants and large-scale agricultural irrigation networks, solenoid valves control the flow of water, chemicals, and fertilizer solutions. Metal screws securing these valves must resist chlorine, sulfates, and biological growth. Stainless steel 316L screws with passivated surfaces are the industry standard, offering service lives exceeding 10 years in continuous outdoor exposure. Precision thread engagement ensures no micro-leakage paths develop under cyclic pressure surges common in irrigation systems.
Modern vehicles contain 15–30 solenoid valves managing transmission fluid, engine cooling, fuel injection, and HVAC systems. In EV platforms, additional valves manage battery thermal management coolant and heat pump refrigerant circuits. Metal screws in these assemblies must withstand vibration levels up to 50G, temperature cycling from -40°C to +150°C, and exposure to transmission fluids and refrigerants. Torque-to-yield screws with thread-locking patches are commonly specified to prevent loosening under engine vibration.
In chemical processing, oil & gas, and pharmaceutical manufacturing, solenoid valves regulate the flow of aggressive media including acids, solvents, and high-pressure steam. Metal screws in these environments must comply with ATEX or IECEx standards for explosion-proof installations. Duplex stainless steel (2205) or Hastelloy screws are specified for the most demanding chemical service, while standard A4 stainless suffices for general process applications. Proper fastener selection directly impacts plant safety and regulatory compliance.
Washing machines, dishwashers, refrigerators, and commercial HVAC systems all incorporate solenoid valves controlled by compact metal screws. In these high-volume consumer applications, cost efficiency is balanced against reliability requirements. Zinc-plated carbon steel screws with nylon patch thread-locking are widely used in appliance manufacturing, while brass screws are preferred in hot water and steam applications due to their inherent corrosion resistance and ease of machining to tight tolerances.
In medical gas delivery systems, dialysis machines, and laboratory analytical instruments, solenoid valves must meet the highest cleanliness and reliability standards. Metal screws in these applications are often manufactured from medical-grade 316L stainless steel, electropolished to Ra ≤ 0.4μm to prevent bacterial adhesion and facilitate sterilization. Every screw must be fully traceable with material test reports (MTRs), and dimensional inspection records are mandatory for FDA-regulated medical device manufacturing.
Self-cleaning filters, reverse osmosis systems, and industrial water treatment plants rely on solenoid valves for automated backwash cycles and media replacement. Metal screws securing these valve bodies face constant exposure to process water, chlorine, and particulate abrasion. Corrosion-resistant fasteners with locking features are essential to maintain system integrity through thousands of automated valve cycles. The precision of thread engagement directly affects the valve's ability to maintain zero-leakage sealing between cycles.
Several macro-trends are fundamentally reshaping how metal screws for solenoid valves are designed, manufactured, and specified by industrial buyers worldwide.
As pneumatic and hydraulic valve manifolds become more compact to fit into smaller machine envelopes, the screws securing individual valve stations are shrinking to M2 and M2.5 sizes while maintaining the same clamping force requirements. This demands exceptional precision in thread rolling, heat treatment, and surface finishing. Cold-forged micro-screws with rolled threads (rather than cut threads) offer 30% higher fatigue strength, making them the preferred choice for high-cycle miniature valve applications in robotics, medical devices, and precision instrumentation.
Leading solenoid valve manufacturers now require full digital traceability for every fastener used in safety-critical assemblies. This means metal screw manufacturers must implement laser marking, QR code tracking, and digital material certificates linked to each production batch. ERP integration between screw suppliers and valve OEMs enables just-in-time delivery with zero-defect quality assurance, reducing valve assembly line downtime and warranty claim costs. Jifeilong's integrated manufacturing approach — combining production, processing, and grinding under one roof — positions the company to meet these stringent traceability requirements.
The choice of base material and surface treatment for metal screws used in solenoid valve assemblies is the single most important factor determining long-term reliability. Here is a comparative overview of the most common material options:
Stainless Steel 304 (A2): Excellent general corrosion resistance, non-magnetic, suitable for water, mild chemicals, and food-grade applications. Cost-effective and widely available. Stainless Steel 316 (A4): Superior resistance to chlorides and marine environments; preferred for chemical processing, coastal installations, and pharmaceutical applications. Brass: Excellent machinability, inherent corrosion resistance to water and steam, naturally antimicrobial. Widely used in plumbing solenoid valves and hot water systems. Carbon Steel (Zinc/Nickel Plated): High strength at lower cost; suitable for dry or oil-lubricated environments where corrosion exposure is limited. Titanium: Exceptional strength-to-weight ratio and corrosion resistance; specified for aerospace, offshore, and ultra-high-pressure valve applications despite premium cost.
Mainly engaged in the integrated manufacturing and sales of various electrical switches, shafts, plastic products and hardware components
It is widely used in fields such as home appliances, solenoid valves, electronics, automobiles, and filtration equipment
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For every production link, from raw material procurement to finished product shipment, strict quality control is implemented. Our metal screws for solenoid valves meet the highest industrial standards.
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The hard work in the past has brought about the current glorious career! Stay updated with the latest insights on metal screws, solenoid valve hardware, and industrial fastener technology.
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Before the machinery starts working, check whether the moving parts have been lubricated with oil. Then start it and check if the clutch and brake are functioning properly. Let the machine tool run idle for 1 to 3 minutes. Do not operate the machinery if it malfunctions.
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View More →With strict management, high-quality products and excellent services, it has won the trust and support of more than 100 enterprise customers in China.
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