Machined from premium Grade 5 titanium bar stock with rolled threads, tight DIN/ISO tolerances (±0.005 mm), and exceptional resistance against galvanic degradation.
The term Titanium Hexagon Star Nut represents a fusion between high-torque outer hexagonal driving geometries and inner or specialized star-pattern (hexalobular / Torx-compatible / star-flange) load dispersion surfaces. Designed primarily for extreme stress environments, these fasteners replace conventional carbon steel, phosphor bronze, and austenitic stainless hardware across European performance engineering segments.
Our manufacturing facility in Baoji, China—recognized globally as "Titanium Valley"—utilizes premium vacuum-arc remelted (VAR) Ti-6Al-4V Grade 5 titanium. Unlike cold-cut threads that induce micro-fissures along root radiuses, our threads are hot-forged and precision-rolled under continuous lubrication. This cold-work hardening guarantees unmatched fatigue limits under alternating axial stresses.
Every production run supplied to European importers and Tier-1 subcontractors complies rigorously with:
Why Hungarian mechanical engineers are migrating from Class 8.8/10.9 steel and A2/A4 stainless to CNC Grade 5 titanium fasteners.
| Mechanical & Physical Property | Gr5 Ti-6Al-4V (Zunvo Standard) | Class 10.9 High-Tensile Steel | A4-80 Marine Stainless Steel | 7075-T6 Billet Aluminum |
|---|---|---|---|---|
| Density (ρ) (g/cm³) | 4.43 (Optimal Balance) | 7.85 (Heavy) | 7.95 (Heavy) | 2.81 (Extremely Light) |
| Tensile Strength (R&subm;) (MPa) | 950 – 1,050 | 1,040 | 800 | 570 (Low Shear Margin) |
| Yield Strength (R&subp;0.2) (MPa) | ≥ 880 | 940 | 600 | 505 |
| Strength-to-Weight Ratio (kN·m/kg) | 214 – 237 (Superior) | 132 | 101 | 202 (Low Creep Limit) |
| Corrosion Resistance (CaCl&sub2; / NaCl) | Immune (Active Passivation) | Rapid Rust if Uncoated | High (Pitting Prone) | Prone to Exfoliation |
| Operating Range (°C) | -196°C to +420°C | -40°C to +250°C | -196°C to +400°C | Max 120°C (Softens) |
| Galvanic Potential against Carbon Fiber | Neutral / Fully Compatible | Severe Anodic Attack | Mild Galvanic Risk | Destructive Galvanic Attack |
Hungary is one of Europe's premier automotive and precision manufacturing centers. Here is where our Gr5 titanium hexagon star nuts and specialty fasteners are actively deployed.
In the automotive assembly clusters around Győr and Kecskemét, weight optimization in electric vehicle (EV) battery cradles and un-sprung upright assemblies is paramount. Our titanium star flange nuts provide vibration-proof clamping without adding parasitic mass, resisting high thermal fluctuations during rapid discharge cycles.
From the Hungaroring paddock to custom tuning shops in Central Pest, Hungarian motorsport workshops replace factory zinc-plated hardware with our Grade 5 titanium caliper bolts, rotor fasteners, and star axle nuts. They eliminate rotational inertia, cut brake fade, and withstand severe track shear loads without thread galling.
Debrecen's growing gigafactory belt requires non-magnetic, corrosion-free hardware for automated battery cell tooling and robotic end-effectors. Titanium star nuts ensure zero magnetic interference with precision sensor arrays, combined with high tensile security under high-cycle vibrational frequencies.
Founded in 2015 in Shaanxi, China, Zunvo Titanium Products operates a state-of-the-art 3,000 m² production facility, serving enterprise OEM and distributor partners across the European Union.
Located in Baoji's Titanium Valley, we acquire prime titanium sponge bar stock with complete melt provenance and original mill chemical test sheets.
Send 2D/3D CAD models (STEP, IGES, DXF) to our application team. We review manufacturability in 24 hours and machine pilot batches in 3 days.
Every star nut and bolt undergoes rigorous thread ring/plug inspection, surface roughness checks, and optical coordinate measuring machine (CMM) verification.
Expedited delivery via air express to Budapest Liszt Ferenc (BUD) in 5-7 days or rail consolidation (China-Europe Railway Express) directly into Hungarian dry ports.
The manufacturing sector in Hungary contributes over 20% of the national GDP, driven by intense foreign direct investment in automotive assembly, electric propulsion, precision medical tooling, and specialized green technology. Traditionally dependent on domestic or Western European DIN distributors charging substantial markups on aerospace-grade titanium, Hungarian procurement managers (Beszerzési vezetők) are transitioning toward direct factory partnerships in China.
Three primary industry transformations are accelerating this change:
Battery pack weight remains the primary bottleneck for vehicle efficiency. Replacing chassis and steering rack steel nuts with titanium saves significant kilograms at scale, directly extending vehicle driving ranges.
High-end custom motorcycle builders and boutique bicycle brands in Lake Balaton and Budapest require aesthetic brilliance that will not fade. Our PVD black, burnt rainbow, and gold coatings deliver both surface hardness and brand identity.
As Hungarian composite manufacturers integrate carbon fiber reinforced polymers (CFRP) into racing and aerospace shells, aluminum fasteners suffer galvanic degradation. Titanium operates at zero electrochemical corrosion risk.
Answers to common inquiries regarding EU tariffs, quality documentation, custom prototyping, and commercial freight to Hungary.
Titanium fasteners exported to Hungary typically fall under HS Code 8108.90.90 (Articles of titanium, other) or under fastener-specific chapters 7318 depending on custom binding tariff information (BTI) and local customs broker classification. When importing into Budapest or inland terminals, third-country duty rates are typically within 3.7% to 7%, accompanied by standard Hungarian VAT (27% ÁFA). We prepare all commercial invoices, packing lists, and declarations of origin accurately to guarantee clean clearance at NAV (Nemzeti Adó- és Vámhivatal).
Yes. Every batch of Grade 5 (Ti-6Al-4V) titanium nuts, star bolts, and CNC specialty fittings is linked to its master heat number. We furnish an EN 10204 Type 3.1 Inspection Certificate specifying actual chemical composition (Aluminum 5.5–6.75%, Vanadium 3.5–4.5%, Iron ≤ 0.40%, Oxygen ≤ 0.20%) and verified mechanical tensile, yield, and elongation values from third-party certified testing laboratories.
Titanium alloys possess a high friction coefficient which can induce galling when dry threads encounter high clamping torques. We resolve this in two ways: first, our threads are mirror-burnished and rolled rather than roughly machined; second, we recommend applying a thin film of copper-based, molybdenum disulfide (MoS&sub2;), or nickel-based anti-seize paste during installation. For select applications, we apply anti-friction PVD dry-film coatings directly at the factory.
Standard catalog items ship from our warehouse within 24 hours. For custom CNC orders matching your technical drawing, production spans 7 to 15 working days. We ship door-to-door via DHL, FedEx, or UPS Express directly to your facility in Hungary within 5 to 7 days. For large production volumes (over 500 kg), we arrange air cargo to Budapest (BUD) or rail freight via the China-Europe Express corridor into Central European consolidation hubs.
Absolutely. Over 60% of our production volume is OEM/ODM tailored. You can send an engineering drawing (PDF, STEP, DXF) or mail a physical sample directly to our engineering division in Baoji. We evaluate thread depth, head geometry, internal star spline drive engagement, and recommend optimal tolerances. Prototypes can be delivered to your inspection bench in approximately 7–10 days.
Whether you require standard DIN/ISO Grade 5 titanium bolts, high-torque hexagon star nuts, or custom CNC motorsport hardware, our Baoji engineering team is standing by to evaluate your technical parameters.
