Wing Nuts & Wedge Clamps

Wing Nuts & Wedge Clamps — Formwork Accessories | Standard | Tie Rod Hardware

Wing nuts and wedge clamps are essential formwork accessories designed for use with tie rods in concrete placement. Wing nuts provide hand-tightenable clamping without tools, while wedge clamps offer rapid installation and removal with a hammer. Both types ensure secure formwork panel connection while allowing quick disassembly after concrete curing.

Material & Specifications

Size Range	M12 to M20 wing nuts / standard wedge clamps for 15mm tie rods
Standard	DIN 315 (wing nut base), custom formwork specifications
Material	Malleable Iron (KTH350-10), Carbon Steel Cast, Ductile Iron
Surface / Coating	Black/Plain, Electroplated Zinc, Galvanized
Type	Wing nut (hand-tighten), wedge clamp (hammer-tighten)
Load Capacity	20-50 kN working load (varies by size and type)

Surface Treatment & Zinc Coating Quality

At BoltNutsPlus, we understand that surface treatment is critical to fastener longevity and performance. Our products undergo rigorous coating processes to ensure maximum corrosion resistance and durability. We offer five premium coating options, each tested to international standards:

• Hot-Dip Galvanizing (HDG) — Thick zinc layer (50-120μm) providing superior long-term corrosion protection for outdoor, marine, and industrial environments. Compliant with ISO 1461 / ASTM A153 standards. Salt spray resistance: 500-1,000+ hours. Ideal for structural steel assemblies exposed to harsh weather.
• Electroplated Zinc Blue-White (Zn Blue/White) — Bright, clean silver-blue appearance with 5-15μm zinc layer. Cr3+ passivation technology, fully RoHS compliant. Ideal for indoor machinery, electronics, and general-purpose applications requiring aesthetic appeal and moderate corrosion resistance.
• Color Zinc / Yellow Zinc (Iridescent Passivation) — Multi-colored iridescent passivation film offering enhanced corrosion resistance (100-200 hours salt spray) with a distinctive golden finish. Widely preferred in automotive, agricultural equipment, and construction machinery sectors for its balanced protection and visual appeal.
• Dacromet Coating — Advanced water-based zinc-chromium coating technology with NO hydrogen embrittlement risk. Provides 1,000+ hours salt spray resistance, making it the preferred choice for high-strength fasteners in extreme environments. Environmentally friendly (no heavy metal discharge), RoHS/ELV compliant, ideal for automotive and wind energy applications.
• Multi-Element Alloy Co-Permeation — Zinc-aluminum-rare earth alloy layer offering 2-3x the corrosion resistance of traditional galvanizing. Features self-healing properties at scratch points, ensuring long-term protection even in damaged areas. Ideal for critical infrastructure, power transmission towers, coastal projects, and marine installations.

Key Features

• Wing nuts allow tool-free hand tightening and quick release
• Wedge clamps enable rapid installation and removal with hammer
• Malleable iron construction provides toughness and impact resistance
• Galvanized finish for repeated outdoor use and corrosion resistance
• High working load capacity ensures secure formwork during concrete placement
• Compatible with standard M12-M20 formwork tie rods

Applications

• Formwork panel clamping with tie rods
• Concrete wall and column formwork assembly
• Bridge and infrastructure construction formwork
• Precast concrete mold assembly
• General construction formwork systems
• Formwork rental and re-use applications

Why Choose BoltNutsPlus?

• ISO 9001:2015 Certified Manufacturing — consistent quality you can trust on every batch
• 15+ Years of Export Experience — serving 40+ countries across 6 continents
• Full Traceability — material certificates (EN 10204 3.1) and comprehensive test reports included
• Custom Packaging & OEM/ODM — your brand identity, your specifications, our precision manufacturing
• Third-Party SGS / Bureau Veritas Inspection Available upon request
• 24-Hour Quote Response — same-day reply for urgent requirements; standard 24-hour turnaround