Scaffolding Bolts

Scaffolding Connection Bolts | M12×100mm | Scaffold Tube & Fitting Hardware

Scaffolding connection bolts are specialized fasteners designed for traditional tube-and-fitting scaffold systems. These bolts feature M12 threads with 100mm standard length, paired with scaffold nuts and washers to connect scaffold tubes to couplers and fittings. Manufactured from high-strength carbon steel for safe load-bearing in construction scaffolding.

Material & Specifications

Size Range	M12 × 100mm (standard) / custom lengths available
Standard	EN 74 (scaffold fitting standard), custom scaffold specifications
Material	Carbon Steel (Grade 4.6/5.6), Galvanized Carbon Steel
Surface / Coating	Hot-Dip Galvanized (HDG), Electroplated Zinc
Head Type	Hex head or square head (for scaffold wrenches)
Accessories	Scaffold nuts, spring washers, flat washers

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

• Standard M12×100mm size fits most tube-and-fitting scaffold systems
• Galvanized finish provides long-term outdoor corrosion resistance
• High-strength carbon steel for safe scaffold load-bearing
• Square head option for use with scaffold podger spanners
• Full-length threading allows adjustable fitting positions
• Compatible with standard scaffold couplers and fittings

Applications

• Tube-and-fitting scaffold system connections
• Construction site scaffolding assembly
• Temporary structures and access platforms
• Formwork support shoring systems
• Event stage and temporary grandstand construction
• Industrial maintenance scaffold systems

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