Anodized Gr5
Direct Factory Inventory & Custom Specifications
High-Performance Titanium Bolts & Fasteners Catalog
Tested against rigorous tensile, shear, and microstructural standards. Available in Commercially Pure Grade 2 for maximum wet-chemical passivity and Grade 5 (Ti-6Al-4V) for high-stress structural joints.
High Shear Grade
Titanium Bolt M8*20mm 25mm Motorcycle Rear Brake Rotor Screw Burnt Blue
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DIN 912 Precision
DIN912 Titanium Hexagon Socket Head Cap Screws Class 8.8 CNC Machined Plain Finish (M0.8-M24)
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Mill Certified Stock
GR5 Titanium Alloy Standard Bolts in Stock Factory Wholesale Price Ready to Ship Bolts and Nuts
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ISO 4018 Standard
ZFTI Factory Direct Titanium Hex Bolt Full Thread ISO 4018 M8 M10 M12 M14 M16 CNC Machined Plain
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Torx Drive Gr5
Titanium Torx Head Motorcycle Bolt Class 8.8 Gr5 PVD Coated CNC Star Screw OEM Manufacturer
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Disc Brake Series
Motorcycle Titanium Bolts Hexagonal Step Flat Head Zinc/Plain Finish M8 1.25 Teeth Disc Brake
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Custom Fasteners
Wholesale GR5 DIN912 Titanium Hex Socket Bolts Custom Size Titanium Screws Industrial Fastener
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White Paper Technical Report
Engineering Fundamentals: Titanium Carriage Bolts (DIN 603 / ISO 8677)
Analyzing physical shear behavior, round dome low-profile aerodynamics, anti-rotation square neck engagement, and micro-alloy kinetics under severe maritime and chemical exposures.
Carriage bolts (traditionally classified under European standard DIN 603 and international standard ISO 8677) are characterized by an enlarged, convex mushroom-style head with an integrated four-sided square neck situated immediately below the crown. While historically fabricated in zinc-electroplated carbon steel or austenitic grades (AISI 304/A2 and AISI 316/A4), heavy offshore and aggressive corrosive applications across the Netherlands demand substantial metallurgical improvements. The implementation of Grade 2 Commercially Pure Titanium (UNS R50400) and Grade 5 Ti-6Al-4V Alpha-Beta Titanium Alloy (UNS R56400) completely eliminates chloride-induced stress corrosion cracking (SCC), crevice attack under elastomeric gaskets, and localized pitting corrosion encountered in Dutch maritime environments.
In traditional timber-to-steel, composite decking, and marine structural connections, the square neck of the carriage bolt embeds securely into the counterbore or square hole of the substrate, preventing mechanical rotation when tightening the nut from the opposing side. Yevzo Titanium achieves precision dimensional control on both hot-forged and multi-axis CNC machined titanium carriage bolts. By maintaining tight neck tolerances (+0.00 / −0.15 mm) and rolling all thread profiles in accordance with ISO 965-2 Metric Thread Tolerance 6g, we prevent premature stress concentrations at the head-to-shank junction, ensuring superior tensile performance even under variable cyclic wave actions and wind harmonic vibrations.
| Alloy & Material Standard | Yield Strength Rp0.2 (MPa) | Tensile Strength Rm (MPa) | Density (g/cm³) | PREN (Pitting Resistance) | North Sea Saline Endurance |
|---|---|---|---|---|---|
| Titanium Grade 5 (Ti-6Al-4V, ASTM B348) | ≥ 828 | ≥ 895 | 4.43 | Immune (>65 equiv.) | Unmatched / Zero Pitting (>50 yrs) |
| Titanium Grade 2 (CP-Ti, ASTM B348) | ≥ 275 | ≥ 345 | 4.51 | Immune (>60 equiv.) | Immune to ambient & boiling seawater |
| Stainless Steel 316L (EN 1.4404 / A4-70) | ≥ 450 | ≥ 700 | 8.00 | 23 – 25 | Pitting & crevice risk in stagnant brine |
| Duplex 2205 (EN 1.4462) | ≥ 450 | ≥ 680 | 7.80 | 35 – 38 | Susceptible to SCC above 60°C |
| Hot-Dip Galvanized 8.8 Structural Steel | ≥ 640 | ≥ 800 | 7.85 | N/A (Sacrificial) | Sacrificial layer depleted in 3–7 yrs |
Spontaneous Passivation
Upon ambient exposure to oxygen, titanium instantly forms a chemically unreactive, 10–25 nm thick amorphous TiO₂ (rutile/anatase) film. Unlike zinc galvanizing or passivated stainless steel, this film heals spontaneously in the presence of air or trace water droplets if scratched during assembly.
45% Mass Reduction
With an engineering density of 4.43 g/cm³ compared to 7.9 g/cm³ for stainless steel, switching to titanium carriage bolts eliminates structural dead weight in maritime rigs, suspended marine gangways, automated agricultural trusses, and racing yacht superstructures.
Elimination of Galling
Yevzo's proprietary metallurgical surface treatments—including physical vapor deposition (PVD), micro-arc electrolytic oxidation, and solid lubricant thread impregnation—mitigate severe friction welding and galling common during high-torque machine installations.
Target Market Integration
Netherlands Industrial Applications for Titanium Carriage Bolts
Engineered to satisfy specific mechanical, atmospheric, and sanitary criteria across prominent economic corridors in the Netherlands.
North Sea Maritime & Offshore Wind
Deployment across the IJmuiden, Borssele, and Hollandse Kust wind farms. Used in cable transition ladders, composite secondary brackets, splash zone clamps, and buoy hulls where seawater salinity, constant wave pounding, and marine organisms swiftly degrade galvanized coatings.
Superyacht Building (Friesland & Zeeland)
Supplying elite Dutch luxury yacht yards (e.g., in Aalsmeer, Makkum, and Kaag). Titanium carriage bolts anchor solid teak decks, mahogany architectural railings, and swim platforms flush to hull structures without iron oxide bleed, tea staining, or hull discoloration.
Agrotechnology & Westland Greenhouses
Westland's enclosed Controlled Environment Agriculture (CEA) installations utilize corrosive fertilizer aeroponics, sulfur vapor heating, and humid acidic irrigation mists. Grade 2 titanium carriage bolts prevent joint shearing across automated hydroponic framing.
Rotterdam-Botlek Petrochemical Hub
Europe’s largest petrochemical node handles chlorinated hydrocarbons, brine cooling loops, and flue gas desulfurization systems. Titanium carriage bolts are specified for fiberglass reinforced plastic (FRP) pipe racks, scrubbers, and storage tank insulation jackets.
Regulatory & Macro Trends
Netherlands Procurement Trends: Life Cycle Costing & Circularity
How strict EU sustainability directives, NEN structural norms, and rising maintenance labor costs are driving Dutch engineers toward titanium fastening solutions.
The Dutch engineering sector is acknowledged globally for its analytical approach to Total Cost of Ownership (TCO). Driven by the Netherlands' national circular economy roadmap to achieve zero-waste manufacturing by 2050, procurement managers in Amsterdam, Rotterdam, and Eindhoven evaluate structural fasteners not merely on initial purchase invoice, but over their full 30- to 60-year operational lifecycle. In wet North Sea offshore or submerged civil infrastructure (such as Rijkswaterstaat flood control barriers and harbor docks), the labor cost of inspecting, derusting, and replacing compromised galvanized or low-grade stainless fasteners exceeds the initial material acquisition price by more than 800%.
NEN-EN 10204 Type 3.1 Certification
Every batch of titanium carriage bolts destined for the Netherlands is supported by genuine 3.1 Inspection Certificates detailing chemical composition via Optical Emission Spectrometry (OES) and mechanical yield, ultimate tensile, and elongation verification.
Full REACH & RoHS Compliance
Complying strictly with European Regulation (EC) No 1907/2006 (REACH) and EU RoHS Directive 2011/65/EU. Our titanium alloys are completely free of hazardous SVHC substances, hexavalent chromium coatings, or toxic lead stabilizers.
Low Carbon Embodied Value
Titanium fasteners deliver indefinitely prolonged operational lifespans without chemical re-coating, toxic runoff, or sacrificial zinc dissipation into fragile Dutch Wadden Sea and delta ecosystems.
Manufacturer Background
Enterprise Strengths: Yevzo Titanium Metal Co., Ltd.
Headquartered in Baoji, China's "Titanium Valley" since 2013, integrating raw material processing, multi-axis machining, and complete quality traceability.
Operating from the Fenghuang 3rd Road High-Tech Industrial Zone in Baoji, Shaanxi, Yevzo Titanium Metal Co., Ltd. stands within the geographic center of China's titanium sponge, melting, and metallurgical supply chain. Our strategic position grants our production lines instantaneous access to premium-grade vacuum-arc remelted (VAR) titanium bar stock conforming to ASTM B348, AMS 4928, and ISO 5832 standards. With over a decade of continuous manufacturing discipline, our production capacity bridges custom prototype engineering and high-volume containerized maritime exports directly to the European single market via Rotterdam and Schiphol air freight hubs.
Full Supply Chain Traceability
Every production heat is tracked from initial sponge reduction to ingot breakdown, hot extrusion, drawing, heading, and final packaging. Ingot heat numbers are laser-marked directly on packaging labels or bolt heads upon request.
Advanced Heading & CNC Milling
We combine rapid cold/warm upset heading for standard DIN 603 profiles with high-speed 5-axis CNC machining centers for custom oversized carriage bolts (M16 to M36) and specialized non-standard square neck configurations.
Custom Thread Standards
We regularly supply ISO metric coarse/fine pitches, Unified National (UNC/UNF) threads, and custom thread pitch engagements engineered for tapped blind holes in massive maritime titanium and composite bulkheads.
Buyer Knowledge Base
Netherlands Purchaser FAQ: Sourcing Titanium Carriage Bolts
Detailed technical, logistics, and compliance inquiries answered for Dutch technical procurement teams, naval architects, and quality inspectors.
How do DIN 603 / ISO 8677 Titanium Carriage Bolts behave in North Sea brackish water compared to AISI 316L?
AISI 316L (A4 stainless steel) possesses a Pitting Resistance Equivalent Number (PREN) of approximately 23–25. While adequate in mild atmospheric water, North Sea splash zones, stagnant marine sediments, and brackish estuarine conditions (such as the Scheldt and Rhine-Meuse deltas) cause severe crevice corrosion underneath bolt washers and pitting across threads. Commercially Pure Grade 2 and Grade 5 Titanium exhibit total thermodynamic passivity in seawater at all ambient temperatures, with pitting resistance equivalent values surpassing 60. They show zero observable wall degradation or loss of structural tensile strength even after decades of continuous immersion.
What Incoterms and shipping timelines apply for imports into the Port of Rotterdam or Amsterdam Schiphol?
We routinely support DDP (Delivered Duty Paid), CIF Rotterdam, FOB Qingdao/Shanghai, and DAP express freight. For rapid engineering prototypes and rush repair maintenance, air express deliveries (DHL/FedEx/UPS) reach Schiphol Airport within 4–6 business days from dispatch. High-volume sea container shipments to the Port of Rotterdam typically take 24–30 transit days. Under DDP terms, our European customs forwarding partners manage all Dutch import formalities, customs clearance, and intra-EU transport directly to your designated warehouse.
What anti-galling lubrication is recommended when pairing Titanium Carriage Bolts with Titanium DIN 6923 nuts?
Titanium-to-titanium mechanical interfaces are susceptible to galling under elevated frictional contact pressure. When fastening Grade 5 or Grade 2 carriage bolts with matching titanium nuts, we recommend applying a nickel-free anti-seize paste, copper-based marine grease, or PTFE dry-film lubricant to the external threads prior to torquing. Alternatively, Yevzo can deliver pre-coated bolts treated with micro-arc oxidation (MAO) or PVD thin-film coatings that permanently reduce the friction coefficient below 0.12, allowing repetitive dry assembly without binding.
How is galvanic corrosion prevented when fastening Titanium Carriage Bolts into aluminum yacht masts or steel frames?
Titanium is electrochemically noble (+0.05V vs SCE). When driven directly through non-passivated carbon steel or marine-grade aluminum (such as 5083 or 6082-T6) in the presence of conductive seawater, galvanic current will selectively accelerate corrosion on the aluminum or steel substrate. To establish complete galvanic insulation, use non-conductive washers and sleeves manufactured from Delrin, POM, PTFE, or EPDM. Isolating the carriage bolt's square neck and head eliminates electrical continuity between disparate alloys, preserving structural integrity.
Can Yevzo manufacture custom carriage bolt geometry outside of standard DIN 603 dimensions?
Yes. While we stock standard metric DIN 603 sizes (M5 to M20), our Baoji CNC machine shop regularly manufactures custom carriage bolts from client 2D engineering prints (PDF/DWG) or 3D CAD files (STEP/IGES). We can configure extended shank lengths, oversized mushroom head diameters for soft wood/composite load distribution, non-standard square neck depths, and specialized unthreaded lead-in pilots for robotic assembly lines.
Which test documentation accompanies shipments destined for the Netherlands?
Shipments include an EN 10204 3.1 Material Test Report (MTR) demonstrating certified chemical melt values and mechanical yield/tensile/elongation test figures. Furthermore, we provide dimensional verification reports (Go/No-Go thread gauge records, optical comparator profiles), ultrasonic internal void inspection records for critical aerospace/subsea diameters, and formal certificates of origin for customs clearance.
Initiate Your Engineering Quote with Baoji's Titanium Specialists
Send us your bill of materials, required DIN/ISO standard, titanium alloy grade (Gr2 / Gr5), target thread dimensions, and delivery location across the Netherlands. Our metallurgical engineering desk delivers comprehensive technical proposals and competitive factory-direct pricing within one working day.