Non-Standard Bolts

Non-Standard Bolts — Custom Drawing-Based Bolt Manufacturing | Any Size & Shape

Non-standard bolts manufactured to customer drawings for applications requiring dimensions, head shapes, or thread configurations beyond standard catalog offerings. Our custom manufacturing capability includes cold heading, hot forging, CNC machining, and thread rolling for prototypes to production quantities. Full engineering support from design review through production.

Material & Specifications

Size Range	M3 to M100 / any custom size
Standard	Custom per customer drawing
Material	Carbon Steel, Alloy Steel, Stainless Steel, Brass, Bronze, Titanium, Inconel
Surface / Coating	Any — HDG, Dacromet, Multi-Element Alloy, PTFE, Geomet, custom
Manufacturing	Cold heading, hot forging, CNC machining, thread rolling
MOQ	500 pcs (standard), 100 pcs (prototype with surcharge)

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

• Full custom manufacturing from customer drawings and specifications
• Cold heading for high-volume production with minimal material waste
• CNC machining for complex geometries and low-volume production
• Wide range of materials including exotic alloys
• Engineering support for manufacturability optimization
• Full material certification and dimensional inspection reports

Applications

• OEM equipment requiring non-standard bolt specifications
• Replacement parts for obsolete or non-standard fasteners
• Specialized industrial and military applications
• Architectural and decorative hardware
• Aerospace and defense custom fasteners
• Any application requiring bolts beyond standard catalog sizes

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