The Zinc Plated Threaded Rod (commonly known as electro-galvanized all thread rod, continuous stud, or DIN 975/976 zinc bar) is a fundamental corrosion-resistant continuous fastener widely specified in MEP HVAC installation, cable tray suspension, concrete anchoring, and general building engineering. Fabricated from premium carbon steel (Q235B or 45# steel) and plated with an advanced trivalent chromium (Cr3+) zinc layer, this fastener provides continuous thread engagement, clean silver aesthetics, and rust protection in accordance with global ISO standards.
Technical Specifications of Zinc Plated Threaded Rod
We manufacture electro-zinc plated threaded bars in Class 4.8 for standard commercial ceiling suspension and Grade 8.8 quenched and tempered steel for high-load structural tension applications. The uniform electro-deposited zinc layer creates a protective anti-corrosion barrier while maintaining precise thread clearance for smooth engagement with DIN 934 zinc-plated hex nuts and rod couplers.
| Parameter | Class 4.8 Zinc Plated Threaded Rod | Grade 8.8 High Tensile Zinc Plated Rod |
|---|---|---|
| Core Material Grade | Low Carbon Steel (Q195 / Q235B) | Medium Carbon Steel (45#) / 40Cr Steel |
| Tensile Strength (Min) | 400 N/mm² (400 MPa) | 800 N/mm² (800 MPa) |
| Zinc Coating Layer | 5 µm – 12 µm Electro-Galvanized (Blue-White) | 5 µm – 15 µm (With Hydrogen Baking Relief) |
| Salt Spray Endurance | 48 Hours Neutral Salt Spray (NSS) | 72 – 96 Hours Neutral Salt Spray (NSS) |
| Execution Standards | DIN 975 / DIN 976-1 / ASME B18.31.2 | DIN 975 / DIN 976-1 / ISO 898-1 |
Electro-Galvanizing and Production Process for Zinc Plated Threaded Rod
At our manufacturing facility in Handan, China, continuous electro-zinc plated threaded rods undergo precision cold drawing, thread rolling, and automated barrel or rack electroplating:
- Cold Drawing & Straightening: Raw steel wire rods are precision-drawn and straightened to maintain tight axial straightness across standard 1m, 2m, or 3m cut lengths.
- Continuous Two-Roll Thread Rolling: High-precision thread dies roll continuous metric helical threads without severing steel grain fibers, maximizing thread shear capacity and pitch accuracy.
- Pickling & Electro-Zinc Plating: Rods are acid-washed to remove oxide scale, followed by galvanic zinc electro-deposition and Cr3+ trivalent chromium blue-white or yellow passivation.
- De-Embrittlement Baking (For Grade 8.8): High-tensile Grade 8.8 rods are thermally baked post-plating to eliminate hydrogen embrittlement risks under tension.
Versatile Applications of Zinc Plated Threaded Rod
Due to their bright clean appearance, customizable cutting length, and uniform corrosion protection, zinc-plated threaded bars serve as key suspension components worldwide:
- MEP, HVAC & Electrical Suspension: Hanging ventilation ducts, cable tray channels, fire sprinkler lines, and lighting fixtures from concrete slabs.
- Concrete Anchoring & Chemical Studs: Embedded into concrete floors with epoxy adhesive anchors to secure steel post bases and equipment frames.
- Structural Steel Bracing & Joinery: Used with DIN 6334 coupling nuts and DIN 9021 large flat washers for timber framing and steel joist clamping.
Quality Assurance and Export Packaging for Zinc Plated Threaded Rod
Handan YiHao Fastener enforces strict Quality Assurance (QA) standards for all overseas export shipments. Testing procedures include coating thickness gauge testing across multiple rod points, full-length thread ring gauge pass/fail checks, axial straightness testing, and neutral salt spray validation.
For maritime freight, 1m to 3m rods are securely bundled, wrapped in heavy-duty waterproof woven material, and strapped onto ISPM 15 compliant fumigated wooden pallets or packaged in solid wooden crates to prevent bending and surface scratching during ocean transport.
Request Factory Direct Pricing for Zinc Plated Threaded Rods
Looking for a trusted manufacturer in Handan, China for Class 4.8 or Grade 8.8 electro-zinc plated threaded rods (DIN 975 / DIN 976)? Contact Handan YiHao Fastener today for technical datasheets, coating test reports, custom cut lengths, and competitive bulk export quotes.
