Fasteners
Polished Gr5 Titanium 12 Point Flange Nuts for Automotive Racing
Grade 5 Ti-6Al-4V | High tensile anti-vibration locking design | Polished micro-finish
Precision Catalog
Factory-Direct Titanium Components Engineered for Marine & Racing Demands
Manufactured directly from traceable raw sponge to precision-milled parts under ISO9001 quality controls. Select a product specification below or request custom CNC drawings review tailored for procurement projects throughout Split.
Exhaust Hardware
Minghai MH-001 Titanium Grade 5 PVD Finish 12 Point Standard Thread Exhaust Manifold Stud Kit M8 X 1.25 Studs Nuts Washers
Rolled M8x1.25 threads | PVD thermal barrier | Superior galling resistance
5-Axis Milling
Titanium CNC Machined Rotor Fine Polished 3 4 5 Axis Milling Component for Sprint Cars Industrial Equipment
Multi-axis dynamic balancing | Tight runout tolerance | Unyielding thermal stability
Racing Hardware
Factory Wholesale Polished CNC Machined Gr5 Titanium Alloy Bolts 12 Points Hex Flange Nuts for Motorcycle Racing DIN GB Standard
DIN / ISO standard dimensions | Forged hex & 12-point heads | Ultralight unsprung mass
Bicycle Tech
Deemount M5x10mm GR5 Grade Titanium T25 Torx Polished Finish DIN/ISO/GB Standard Bicycle Brake Rotor Bolts for MTB Mountain Bike
Precision machined T25 drive | Zero corrosion in coastal air | High fatigue strength
Anodizing Finish
Manufactures Customized Gr5 Titanium Bolt Colorful Rainbow Custom Hex Socket Torx Motorcycle Screw RACING
Electrolytic color anodized | Titanium oxide wear film | Custom laser etch available
ISO9001 Studs
Titanium M8x1.25x55mm Exhaust Manifold Stud Kit GR5 Grade Racing Application Polished/Anodized/PVD Finish ISO9001 Certified
Extreme thermal cycling proof | High preload retention | Certified chemical analysis
High Strength
High-Strength Titanium Disc Head Torx Flange Bolt with CNC Precision for Bicycle Parts
Engineered flange footprint | Stress dissipation geometry | Precision CNC deburred
Industrial Application Ecosystem
Localized Engineering Scenarios Across Split & the Dalmatian Coastline
Split occupies a pivotal position on the eastern Adriatic, serving as Croatia's preeminent maritime hub, shipyard base, and luxury yacht transit center. The operational environments across Kastela Bay and the Dalmatian archipelago demand materials that withstand hypersaline moisture and severe cyclic fatigue.
Shipbuilding, Shipyards & Naval Refits
Split's legendary shipbuilding facilities in northern Split and nearby Trogir require high-integrity structural fasteners and thruster parts. Traditional stainless steel (such as 316L) routinely suffers from pitting and crevice corrosion under warm Adriatic saltwater conditions.
Our Gr2 commercially pure and Gr5 titanium shafting, sea-chest valves, and rudder pins exhibit virtually zero corrosion rates in high-velocity seawater.
Adriatic Superyacht Maintenance & Rigging
As a major Mediterranean yacht charter capital, Split's marinas (including ACI Marina Split and Marina Kastela) handle rigorous seasonal maintenance. Racing catamarans and mega-yachts require deck hardware that eliminates unneeded mast-top weight while resisting salt spray.
We supply custom CNC machined titanium turnbuckles, chainplates, mast fasteners, and clevis pins delivering a 44% weight reduction against marine stainless.
Offshore Aquaculture & Subsea Marine Science
With deep-sea research conducted across the Adriatic trench and intensive aquaculture facilities operating around Brac and Solta islands, equipment faces relentless biological fouling and hydrostatic pressure.
Our titanium sensor housings, sonar acoustic brackets, and underwater camera enclosures remain biologically inert and pressure-tight without galvanic degradation.
Coastal Desalination & Utility Pumping
Dalmatia’s municipal and island auxiliary water supplies rely increasingly on reverse osmosis (RO) desalination plants that operate at extreme pressure thresholds with aggressive brine concentrations.
Vunza manufactures high-precision CNC titanium pump impellers, manifold studs, and high-pressure flanges that guarantee uninterrupted multi-year duty cycles.
Boutique Motorsport, Karting & High-End MTB
Dalmatia’s rugged coastal topography makes Split a hotspot for competitive downhill mountain biking (Marjan & Biokovo trails) and regional motorcycle racing clubs needing track-tested mechanical advantage.
Supplying ultra-precise M5 Torx disc brake bolts, Gr5 exhaust manifold stud kits, and titanium valve retainers for performance tuning shops across Split.
Strategic Outlook
Emerging Trends Transforming Split’s Advanced Precision Procurement
As Croatia solidifies its position within the Eurozone and Schengen frameworks, industrial procurement practices throughout Split-Dalmatia County are experiencing unprecedented modernization.
Decarbonization of Commercial & Tourist Fleets
EU green marine directives are pushing Adriatic ferry operators and commercial charter vessels in Split toward electric propulsion and hybrid powertrains. Every kilogram of superfluous hull weight directly diminishes battery range.
Consequently, local marine architects are systematically substituting nickel-bronze and heavy steel hardware with Baoji-manufactured aerospace-grade titanium to maximize payload efficiency.
Total Life-Cycle Costing Over Initial Purchase Price
Split engineering departments and harbor authorities historically chose cheaper bronze or alloy steels, only to incur exorbitant shipyard dry-docking and replacement labor costs every 24 to 36 months.
Modern Croatian procurement directors now prioritize Zero-Maintenance Alloys. Titanium's self-healing TiO2 passive oxide film completely stops chloride attack, rendering lifetime replacement costs virtually zero.
Direct Factory-to-Harbor Supply Chains
Local middlemen across southern Europe often introduce markups exceeding 200% on imported specialty fasteners while lengthening delivery schedules. Split industrial managers are aggressively shifting toward certified Chinese OEM manufacturers.
By collaborating directly with Vunza in China's Titanium Valley, Dalmatian enterprises acquire mill-traceable custom components with express air delivery right into Split Airport (SPU) or cargo shipping to the Port of Split.
Engineering Whitepaper
Titanium Grade Metallurgy & CNC Machining Feasibility Guide
Titanium is known for its formidable strength-to-weight ratio, yet its low thermal conductivity (7.2 W/m·K) and strong chemical reactivity at elevated cutting temperatures demand specialized CNC toolpaths, high-pressure coolant strategies, and rigid workholding.
Empirical Mechanical Property Matrix: Selecting the Ideal Grade
For engineering teams submitting CAD models for manufacture, the selection of raw stock dictates cutting shear angle, spindle feed rates, and downstream surface finish capability:
| Titanium Grade | Standard Specs | Tensile Strength (MPa) | Yield Strength (MPa) | Hardness (Rockwell) | Target Engineering Application |
|---|---|---|---|---|---|
| Grade 2 (CP-Ti) | ASTM B348 / DIN 3.7035 | ≥ 345 | ≥ 275 | HRB 80 | Split seawater piping, ballast valves, chemical heat exchangers, low-stress marine clips. |
| Grade 5 (Ti-6Al-4V) | ASTM B348 / AMS 4928 | ≥ 895 | ≥ 828 | HRC 36 | Engine head studs, racing valve retainers, high-load yacht rigging, marine drive shafts. |
| Grade 23 (Ti-6Al-4V ELI) | ASTM F136 / ISO 5832-3 | ≥ 860 | ≥ 795 | HRC 34 | Medical implants, specialized deep-sea submersible pressure vessels requiring high fracture toughness. |
| Grade 9 (Ti-3Al-2.5V) | ASTM B338 / AMS 4943 | ≥ 620 | ≥ 483 | HRC 28 | Hydraulic lines, high-performance cycling tubes, lightweight marine tubular framework. |
| CoCrMo Alloy | ASTM F75 / ISO 5832-4 | ≥ 950 | ≥ 650 | HRC 32 - 40 | Dental prosthetics, medical tools, extreme wear and friction bushings in harsh environments. |
Vunza's Precision Machining Strategy
Because titanium creates intense localized heat that doesn't dissipate through the chip, our 34 multi-axis CNC centers use specialized TiAlN-coated carbide tooling with through-spindle high-pressure coolant (up to 70 bar). This prevents galling, maintains precise dimensional tolerances to 0.005 mm, and ensures surface finishes down to Ra 0.4 μm without work-hardening the workpiece.
Thread Rolling vs. Thread Cutting
For high-stress automotive, marine exhaust, and yacht structural studs, cut threads create micro-notches that can cause fatigue failure under severe vibration. Vunza uses specialized cold-thread rolling equipment. This process reforms the metal grain continuously along thread crests and roots, increasing shear and fatigue life by over 30% compared to cut threads.
International Logistics Architecture
Seamless Freight, Customs Clearance & Rapid Delivery into Split, Croatia
Importing precision CNC goods into the European Union requires absolute procedural clarity. We maintain an integrated logistics pipeline connecting our manufacturing facility in Baoji directly to your loading bay or dock in Split.
1. Express Air Courier (3-5 Days)
For emergency dry-dock repairs, bespoke prototypes, and high-priority racing batches. Shipped directly via DHL Express, FedEx Priority, or UPS Worldwide into Split Airport (SPU). Direct door-to-door courier clearance handles VAT and customs filings efficiently.
2. Consolidated Sea Freight (26-32 Days)
Ideal for recurring OEM fastener contracts, large-diameter titanium raw stock, and heavy subsea components. Container shipments route directly via Adriatic maritime corridors into the Port of Rijeka or Port of Split (Sjeverna luka), minimizing inland transit costs.
3. Transparent EU Import Compliance
We supply complete commercial documentation with every export: HS Code classification (e.g., 8108.90 for turned titanium parts, 7318.15 for fasteners), Certificate of Origin, and EN 10204 3.1 Material Test Reports to ensure rapid Croatian Customs (Carinska uprava) release.
The Manufacturer Advantage
Why Global Tier-1 Buyers Choose Vunza Titanium Industry
Operating directly within Gaoya Village Industrial Zone in Baoji—globally celebrated as China's Titanium Valley—we unite raw sponge purification, multi-axis precision machining, and export clearance under one strict quality umbrella.
China's Titanium Valley Supply Chain
Founded in 2008 immediately adjacent to the Baoti Group Industrial Park, our plant commands unfettered, prioritized access to prime certified titanium sponge and certified aerospace ingots, shielding our customers from international commodity market fluctuations.
34 Multi-Axis CNC Machine Centers
Equipped with 34 high-speed multi-axis (3-axis, 4-axis, and simultaneous 5-axis) CNC milling and precision Swiss turning systems. We reliably machine complex geometric contours, deep oil galleries, and precision splines with repeatability held to 0.005 mm.
Senior Craftsmanship (>13 Yrs Exp)
Over 50% of our frontline technicians and CNC programmers have worked with titanium for more than 13 years. This specialized experience eliminates the thermal deflection and micro-chatter that general CNC machine shops face when tackling titanium alloys.
Full Traceability from Sponge to Part
We reject recycled scrap stock. Every billet is inspected with spectroscopic chemical analysis and ultrasonic internal flaw detection. Comprehensive 3.1 material test certificates and CMM dimensional inspection records ship directly with every consignment.
Procurement Clarity
Frequently Asked Questions by Croatian & Split Procurement Teams
Straightforward answers addressing commercial trade rules, technical specifications, and logistics workflows for engineering teams sourcing parts from Split.
Can Vunza machine non-standard custom titanium parts directly from our engineering CAD drawings?
Yes, our in-house engineering and R&D group frequently works from customer 2D schematics (PDF, DWG, DXF) and 3D solid models (STEP, IGES, SolidWorks). Whether you need custom marine exhaust flanges, prototype underwater acoustic housings, or bespoke titanium turnbuckles, we evaluate Design for Manufacturability (DFM) within 9 hours and provide sample proofs before launching batch production.
How does titanium Grade 5 perform against 316L stainless steel in Split's coastal sea environment?
In warm, highly saline Adriatic waters, marine-grade 316L stainless steel remains vulnerable to pitting, crevice attack, and stress-corrosion cracking beneath marine bio-crusts and static seals. Ti-6Al-4V Grade 5 is completely immune to pitting and crevice corrosion across typical seawater temperatures. Additionally, it offers double the yield strength of 316L at nearly half the physical weight (4.43 g/cm³ vs. 8.0 g/cm³), eliminating recurring maintenance cycles.
What are your Minimum Order Quantities (MOQ) for enterprises operating in Split?
We adapt our MOQs according to part complexity and machining setups:
- Complex 5-Axis Parts (e.g., Sprint Car & Marine Brake Rotors, Custom Bushings): Minimum order starting at 10 units.
- Precision Titanium Fasteners & Studs (e.g., M8 Exhaust Kits, Flange Nuts): 100 to 500 units per production run.
- Pre-Production R&D Prototypes: Single-piece prototype validation is available for industrial project feasibility testing.
What surface treatment and cosmetic finishing options do you offer for visible assemblies?
We offer mirror micro-polishing, matte glass-bead blasting, high-durability Physical Vapor Deposition (PVD) coatings (including gloss black, titanium gold, and burnt blue), and uniform electrolytic anodizing across a wide range of colors (such as deep blue, purple, bronze, and rainbow). These treatments protect titanium's sliding friction interfaces and provide distinct visual branding for luxury marine deck hardware and competition motorcycle builds.
How does payment, VAT, and customs release operate when importing into Croatia?
Transactions can be settled via international bank wire (T/T), Letter of Credit (L/C), or secure Alibaba Trade Assurance. For Croatian enterprises registered with an active EU EORI and VAT number (OIB), customs clearance proceeds smoothly under standard EU trade frameworks. Import duties typically average between 3% and 6% depending on HS classification, with domestic Croatian VAT (PDV) handled according to conventional EU import mechanisms.
How does Vunza prevent galvanic corrosion when mating titanium to aluminum marine components?
Titanium is electrochemically noble. When directly bolted to bare marine aluminum (e.g., Al 5083/6082 hulls or masts) in electrolyte-rich Adriatic seawater, the aluminum can act as a sacrificial anode. We advise our Split clients on proper mechanical isolation strategies, supplying our titanium parts with custom-machined Delrin, PTFE, or high-density insulating washers and engineered marine paste coatings to permanently prevent galvanic circuits.
Ready to Engineer Custom Titanium Components for Split?
Send your CAD drawings, required alloy grade, and delivery deadlines today. Our technical review team will analyze your files and provide a detailed DFM evaluation with clear factory pricing within 9 hours.
Contact Us
Direct access to Baoji Senior Machining Engineers