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Zinc-Plated Cross Recessed Pan Head Shoulder Screw - Reliable China Suppliers | Factory Direct for Industrial Use
⚙️ Superior Torque & Efficiency
🔩 Patented Six-Point Star Recess
Even torque distribution — withstands up to 50N·m high torque, eliminates cam-out and avoids screw/tool damage. Ideal for vibration-prone automotive engines and industrial pumps.
Even torque distribution — withstands up to 50N·m high torque, eliminates cam-out and avoids screw/tool damage. Ideal for vibration-prone automotive engines and industrial pumps.
🎯 Self-Centering Feature
Cuts tool alignment time by 40% for automated production lines. Compatible with torque-controlled tools for repeatable precision in quality-critical industries.
Cuts tool alignment time by 40% for automated production lines. Compatible with torque-controlled tools for repeatable precision in quality-critical industries.
🔧 Full Customization Solutions
📐
Dimensions: M1.6–M18 threads (standard / fine / rough pitch), length 3mm–120mm; reinforced heads, stepped handles, grooved designs — all with strict tolerances of ±0.02mm.
🧱 Materials
✔304/316 Stainless Steel — suitable for outdoor humid environments, with corrosion resistance
✔4140 Alloy Steel — tensile strength 1200 MPa, suitable for heavy-duty conditions
✔C36000 Copper — 65% conductivity, suitable for electronic devices
🛡️ Surface Treatments
✔Zinc Coating — RoHS compliant, 50-hour salt spray resistance
✔Nickel Coating — polished surface with corrosion resistance
✔Black Oxidation — reduces friction by 50%, suitable for moving parts
✔PTFE Coating — extreme temperature tolerance from -40°C to 260°C
💡 Expert Tip: Inform our engineer about your working environment and they will help you choose the best surface treatment method.
🏭 Where These Screws Actually Work
Shoulder screws are widely used in scenarios where there are clear requirements for precise axial positioning and consistent load-bearing spacing. The details are as follows:
01
Electronic Devices
Secure circuit boards, connectors, and device housings without nicking sensitive parts. We've had clients use these for custom IoT gadgets and medical monitors—where a loose screw or bad fit could ruin thousands of dollars in gear.
02
Automotive Parts
Hold small mechanical bits in engines, interiors, and electrical systems—they stand up to the shaking and temperature swings that break cheap screws. Perfect for custom builds or hard-to-find replacement parts that need to match OEM standards.
03
Precision Machinery
Fit custom fixtures, tooling, and equipment assemblies. Manufacturers swear by these for CNC machines and production lines—even a tiny size off can throw the whole operation off track, and we don't do "off."
🔬 Precision Manufacturing & Quality Assurance
🏗️
Production Craft: Certified raw materials with ultrasonic testing to eliminate internal defects; 100–200 tons cold-forged heads for dense, defect-free structures; cold-rolled threads (20% higher tensile strength than cut threads) for smooth insertion.
✅
Rigorous Testing: Batch laser dimension verification (±0.01mm accuracy), tensile/yield load testing and Class 6H thread pitch inspection; ASTM B117 salt spray testing (12–150h) and 10–2000Hz vibration testing for anti-loosening performance; zero defective products delivered to customers.
🤝 Why Partner With Us?
🎓
Technical Expertise: 30+ years of engineering experience with end-to-end support — material selection, torque calculation and on-site installation guidance tailored to your project's unique challenges.
⚡
Customization Leadership: Specializes in non-standard designs, including titanium/Inconel materials for extreme conditions; 10–30 day custom sample delivery.
📋
Quality & Delivery Commitment: Provide Mill Test Certificates and full ISO compliance documents.
🎬 Professional Customization
❓ Frequently Asked Questions
Q
What is the maximum torque these screws can withstand?
Our screws feature a patented six-point star recess design that provides even torque distribution and can withstand up to 50N·m of high torque. This eliminates cam-out and prevents damage to both the screw and tool, making them ideal for high-vibration environments such as automotive engines and industrial pumps.
Q
What customization options are available for dimensions and materials?
We offer full customization across a wide range: thread sizes from M1.6 to M18 (standard, fine, or rough pitch), lengths from 3mm to 120mm, and features such as reinforced heads, stepped handles, and grooved designs — all held to ±0.02mm tolerances. Available materials include 304/316 stainless steel, 4140 alloy steel, C36000 copper, and specialty materials like titanium and Inconel for extreme conditions.
Q
Which surface treatment is best for outdoor or corrosive environments?
For outdoor or high-humidity environments, we recommend zinc coating (RoHS-compliant, 50-hour salt spray resistance) or nickel coating (polished surface with enhanced corrosion resistance). For extreme temperature applications ranging from -40°C to 260°C, a PTFE (polytetrafluoroethylene) coating is the optimal choice. Our engineers can assess your specific working environment and recommend the most suitable treatment.
Q
What quality testing procedures are applied before shipment?
Every batch undergoes a comprehensive quality assurance process including: laser dimension verification (±0.01mm accuracy), tensile and yield load testing, Class 6H thread pitch inspection, ASTM B117 salt spray testing (12–150 hours), and 10–2000Hz vibration testing for anti-loosening performance. We provide Mill Test Certificates and full ISO compliance documentation, with a commitment to zero defective products delivered to customers.
Q
How long does it take to receive custom samples?
Custom sample lead times typically range from 10 to 30 days, depending on the complexity of the design and material requirements. Our engineering team provides end-to-end support — from initial design review and material selection to torque calculation and on-site installation guidance — to ensure your custom samples meet all project specifications on the first delivery.
Q
Are these screws suitable for use in electronic and medical devices?
Yes. Our screws are widely used in electronic devices including IoT gadgets, medical monitors, circuit board assemblies, and connector housings. The self-centering feature and precise tolerances (±0.02mm) ensure a secure, damage-free fit for sensitive components. For medical applications, we recommend 316 stainless steel or C36000 copper depending on the specific conductivity and biocompatibility requirements of your device.