Product Overview
The Zinc Plated Threaded Rod is a straight, continuous-length fastener with a uniform external thread along its entire length or a designated portion. Served as a fundamental building block for countless mechanical, construction, and fabrication projects, it is used to create custom-length bolts, studs, hangers, supports, and threaded connectors. The electroplated zinc coating provides a cost-effective layer of corrosion resistance, making it suitable for both indoor and protected outdoor applications.
Key Features & Benefits
Versatility & Customization: Can be easily cut to any required length on-site, offering unparalleled flexibility for prototyping, repairs, and custom assemblies.
Continuous Threading: Provides full engagement with nuts or tapped holes along its usable length, allowing for adjustable positioning.
Economical Corrosion Protection: The zinc plating acts as a sacrificial anode, offering good protection against rust and oxidation in normal atmospheric conditions.
Wide Compatibility: Available in both metric (ISO) and imperial (UNC/UNF) thread standards, ensuring compatibility with a global inventory of nuts and components.
Dual-Purpose: Can function as a stud (threaded on both ends) or a through-rod, serving in tension, compression, or as a pivot/axle.
Material Specifications & Grades
| Material & Grade | Standard Specification | Tensile Strength (min) | Yield Strength (min) | Core Hardness | Characteristics |
|---|---|---|---|---|---|
| Low Carbon Steel, Grade 4.8 | ISO 898-1 / ASTM A307 | 420 MPa | 340 MPa | HRB 70-100 | General purpose, excellent for low to moderate stress applications. |
| Medium Carbon Steel, Grade 8.8 | ISO 898-1 / SAE J429 | 800 MPa | 640 MPa | HRC 22-32 | Quenched & tempered. For higher strength requirements in structural and mechanical setups. |
| Stainless Steel 304/A2 | ASTM A276 / ISO 3506-1 | 500 MPa | 210 MPa | – | Good general corrosion resistance, non-magnetic. |
| Stainless Steel 316/A4 | ASTM A276 / ISO 3506-1 | 500 MPa | 210 MPa | – | Superior corrosion resistance, especially against chlorides. |
Technical Data & Standards
Thread Standards:
Metric: ISO 2280 (Continuous Thread), DIN 975. Common pitches: Standard coarse (e.g., M10x1.5) and fine threads.
Imperial: ASME B1.1 (UNC, UNF threads). Common sizes: 1/4″-20, 5/16″-18, 3/8″-16, 1/2″-13, etc.
Plating Specification: Electroplated per ASTM B633, Fe/Zn 5, with clear (blue-bright) or yellow chromate conversion coating for enhanced corrosion protection and appearance.
Diameters & Lengths:
Standard Diameters (Metric): M4, M5, M6, M8, M10, M12, M16, M20.
Standard Diameters (Imperial): #8, 1/4″, 5/16″, 3/8″, 1/2″, 5/8″, 3/4″.
Standard Cut Lengths: 1m, 2m, 3m (or 3ft, 6ft, 12ft). Also available in long coils or custom cut lengths.
Performance Data
Corrosion Resistance: Standard zinc plating with chromate passivation typically provides 72 to 96 hours of protection before the appearance of white rust in neutral salt spray testing (ASTM B117).
Torque Values: Recommended installation torque varies based on diameter, grade, lubrication, and intended use (see engineering tables).
Temperature Limit: The zinc-plated coating is generally stable for continuous service up to 120°C (250°F). Above this temperature, the coating may degrade.
Common Applications
Construction & Plumbing: Pipe hangers, electrical conduit supports, suspension rods, and general anchoring.
Industrial Maintenance: Creating custom-length bolts for machinery repair, fabricating jigs and fixtures.
Retail & Display: Assembling shelving units, display racks, and signage supports.
DIY & Fabrication: General prototyping, vehicle repairs, furniture building, and workshop projects.
Quality Control
Dimensional Compliance: Threads are rolled or cut to ANSI/ISO standards, verified with thread gauges (Go/No-Go).
Plating Quality: Coating thickness is controlled to meet specification (typically 5-8µm) and is tested for adhesion (quench test) and corrosion resistance (salt spray test samples).
Material Certification: Rods are sourced from certified mills, and Material Test Reports (MTRs) are available upon request for traceability.
Production Standard: Manufactured under a certified ISO 9001:2015 Quality Management System.
About the Manufacturer
Hebei Wohe Fastener Manufacturing Co., Ltd., based in the Yongnian fastener manufacturing hub of Hebei, China, specializes in the production of standard and custom fastening components. Our facility combines thread-rolling expertise with automated plating lines to produce reliable and consistent zinc-plated threaded rods. With a focus on export-quality products, we supply distributors and OEMs worldwide, supporting industries from construction to general manufacturing with versatile and cost-effective fastening solutions.
Ordering & Service Information:
Packaging: Standard lengths are bundled and wrapped for protection. Custom-cut lengths are clearly labeled.
Customization: Available in special diameters, lengths, materials (e.g., brass, aluminum), and alternative platings (e.g., hot-dip galvanized, nickel).
Minimum Order Quantity (MOQ): Standard items: negotiable, typically starting from 500kg or a mixed carton. Custom items: subject to specification.
Lead Time: Standard inventory items: 10-15 working days. Custom production: 20-30 working days.
Note: For critical structural applications, ensure the grade and diameter of the threaded rod are suitable for the calculated loads. Cutting the rod may expose unplated ends; touch-up with zinc-rich paint is recommended for severe environments. Always use a nut of matching grade and thread specification. Specifications are subject to our continuous improvement policy and may change.
