Metal Fastener
Product Series Introduction
Screws/Bolts
Material: Carbon steel (hot-rolled steel wire ML08AL, cold-rolled steel sheet SPCC), stainless steel (302, 304, 316 series), aluminum alloy, copper, brass
OEM customization available.
Specifications: Metric thread sizes M3–M20, with BSW, DIN, HG, JB, and other imperial and German standards/customization available.
Features:
High-strength, high-precision thread forming;
Uniform surface plating for rust and corrosion resistance.
Excellent torque stability, compatible with a variety of electrical assembly structures.
Surface Treatment: Environmentally friendly zinc plating (white, colored, blue, and black zinc) and other plating options (nickel, chromium, copper, tin, silver, Dacromet, etc.). Special anti-corrosion coatings are available.
Terminal Blocks
Material: Carbon steel, copper, brass
OEM customization available. Product Specifications: Available in various sizes, including M3, M3.5, M4, M5, M6, M8, and M10.
Product Features:
Compatible with a variety of screw sizes and terminal configurations;
High-conductivity copper construction ensures stable contact.
High mechanical strength and easy installation.
Applications: Widely used in electrical products such as relays, contactors, switches, thermostats, circuit breakers, electricity meters, and gas meters.
Nuts and Studs
Made using high-precision turning equipment and cold heading processes;
Material: Carbon steel, stainless steel, brass, aluminum alloy, etc.
Suitable for electrical assembly structures, busbar connections, or terminal reinforcement;
High-temperature, vibration, and corrosion resistance ensure long-term stable use.
Surface Treatment and Corrosion Resistance
Surface Treatment
Environmentally Friendly Zinc Electroplating
- Available in white, blue, colored, and black zinc.
Other electroplating methods: nickel, chromium, copper, tin, silver, Dacromet, etc.
Anti-fingerprint or high-temperature resistant surface treatments are available upon request.
Plating Thickness
Conventional electroplating thickness: 4–12 μm (economical)
Hot-dip galvanizing thickness: 37–54 μm
Higher corrosion resistance levels can be customized upon request.
Salt Spray Test
According to NSS standards (5% NaCl concentration, pH 6.5–7.2):
Typically 48–96 hours; testing time can be extended depending on the electroplating thickness and customer requirements.
Manufacturing and Quality Control
Production Capacity: 50,000,000 pieces/month
Lead Time: 7–15 days (including molds/tooling and samples)
Free Samples: 10–50 pieces available
Quality Standards: ISO9000, IATF16949, RoHS, REACH
Manufacturing Process Includes:
Cold Heading/Turning/Thread Forming
Heat Treatment and Stress Relief
Automated Plating and Thickness Testing
Torque Testing, Salt Spray Testing, and Full Dimensional Inspection
Each batch of products is accompanied by a test report to ensure that electrical conductivity, mechanical strength, and corrosion resistance meet international standards.
Product Parameters and Technical Specifications
| Items | Screws/Bolts | Terminal Blocks | Nuts & Studs |
| Material | Carbon steel, stainless steel, aluminum alloy, copper, brass | Carbon steel, copper, brass | Carbon steel, stainless steel, brass, and aluminum alloy |
| Surface Treatment | Environmentally friendly zinc plating/nickel/chromium/copper/tin/silver/dacromet, etc. | Zinc plating/nickel plating/tin plating, etc., ensuring conductivity and corrosion resistance | Zinc plating/nickel plating/chromium plating, etc., for corrosion resistance |
| Plating Thickness | Conventional electroplating: 4–12 μm, hot-dip galvanizing: 37–54 μm | Conventional electroplating: 4–12 μm | Conventional electroplating: 4–12 μm, hot-dip galvanizing optional |
| Salt spray test | 48–96 hours (customizable upon request) | 48–96 hours (customizable upon request) | 48–96 hours (customizable upon request) |
| Dimension Range | M3–M20, supports Imperial, German, and custom sizes | M3–M10, and other sizes | M3–M20, compatible with various thread sizes |
| Samples and Delivery | Free samples of 10–50 pcs, delivery time 7–15 days (including molds/samples) | Same left | Same left |
| Monthly Capacity | 50,000,000 pcs/month | Same left | Same left |
| Packaging | Inner plastic bag/box, outer carton/pallet | Same left | Same left |
| Certification Standards | ISO9000, IATF16949, RoHS, REACH | Same left | Same left |
| Main Applications | Electrical connections, structural fixings, high and low voltage electrical assembly | Terminals for relays, contactors, circuit breakers, electric meters, gas meters, etc | Electrical structure reinforcement, busbar connections, and terminal mounting locations |
Application Areas
Connection Structures for New Energy and Energy Storage Systems
Industrial Control and Automation Equipment
Electrical Contactors and Circuit Breaker Assemblies
Metering Devices (Electricity/Gas Meters)
Home and Commercial Low-Voltage Distribution Systems
Manufacturing Advantages and Customization Capabilities
XIAMEN APOLLO boasts an integrated production line from cold heading to electroplating, supporting OEM/ODM customization for both standard and non-standard parts.
Manufacturing Advantages:
Multi-station automated molding equipment with a tolerance control of ±0.02 mm;
Electroplating thickness can be adjusted to meet different salt spray life ratings.
A professional engineering team can design structures and molds based on customer drawings.
Fast delivery: 3–5 days for samples and 7–15 days for orders.
Why Choose XIAMEN APOLLO
Over 30 Years of Experience in Metal Fastener Manufacturing
Monthly Production Capacity of Over 50 Million Units, Supporting Stable High-Volume Delivery
Full Quality System Certification (ISO/IATF/RoHS/REACH)
Environmentally Friendly Surface Treatment Technology Complies with European and American Market Standards
Flexible OEM/ODM Customization Services, with a Rapid Response from Our Engineering Team
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