Anodized Gr5 Titanium Torx Bolts M4 M5 M6*15
- Grade Ti-6Al-4V (Gr5)
- Drive Type Torx Precision Drive
- Finish Electrolytic Anodized
- Application Body Shell & Performance
Precision Catalog Selection
High-Performance Titanium Hardware Series
Direct from our Baoji production facility to Sofia, Plovdiv, Varna, and Burgas. Explore our precision hot-forged and CNC-machined titanium wheel bolts, structural studs, and racing hardware engineered to ISO 898-1 and DIN automotive standards.
Burnt Blue Titanium M5x16mm Stem Bolt with Washer
- Thread Standard DIN Metric M5x16mm
- Included Integrated Washer
- Color PVD Burnt Blue Finish
- Yield Strength ≥ 828 MPa
Titanium Wheel Lug Bolts M14x1.5 & M12x1.25
- Seat Design Conical 60° / Ball R13
- Tensile Rating 950 - 1050 MPa
- Thread Pitch M14x1.5 / M12x1.25
- Certification ASTM B348 Mill Certified
GR5 Titanium Socket Head Class 8.8/10.9 Bolts
- Machining 5-Axis CNC Precision
- Corrosion Zero Marine/Road Salt Rust
- Thread Type Rolled Metric Class 6g
- Finish Micro-Polished Plain
Titanium Flat Head M1.6-M16 Industrial Screws
- Head Profile Countersunk / Flat DIN 7991
- Strength Class Exceeds Steel Class 8.8
- Mass Ratio 45% Lighter than Steel
- Environment High Vibration / Moisture
Anodized High Strength GR5 M6 Umbrella Head Bolts
- Head Style Low-Profile Umbrella Flange
- Clamping Wide Clamping Surface Area
- Surface Hard Anodized Oxide Layer
- Fitment Aerodynamic Fairing / Chassis
GR5 Titanium Torx Round Head Fine Thread Metric Bolts
- Thread Pitch Fine Metric (1.0 / 1.25 / 1.5)
- Manufacturing Cold Heading + CNC Finishing
- Shear Rating ≥ 550 MPa
- Application Rotors, Hubs & Engine Bays
Anodized Rainbow GR5 Titanium Flange Allen Bolt
- Flange Form Integrated Washer DIN 6921
- Thermal Drift Minimal Expansion Under Heat
- Coating Custom Spectrum Rainbow
- Ordering Batch OEM / Stock Express
Engineering Authority & Market Alignment
Metallurgical Precision for Bulgarian Road, Track, & Heavy Fleet Conditions
Why Tier-1 tuning garages, fleet operators, and industrial distributors across Bulgaria are converting from high-tensile steel to cold-rolled, hot-forged Grade 5 Titanium wheel fasteners.
Severe Chemical De-Icing Resilience
Winter conditions along the Hemus (A2) and Trakia (A1) motorways, through the Balkan Mountain passes (Shipka, Petrohan), subject wheel assemblies to heavy applications of calcium chloride, road salt, and abrasive sand. Standard Class 8.8 and 10.9 zinc-plated steel wheel bolts experience accelerated pitting, rust bleeding, and severe galvanic seizure in aluminum wheel hubs. Grade 5 Titanium (Ti-6Al-4V) develops a self-healing titanium dioxide (TiO2) passivation film immediately upon exposure to air, making it 100% immune to road salt spray and de-icing chemicals.
Rotational Mass & Unsprung Weight Reduction
Every kilogram saved at the wheel hub has up to four times the dynamic driving effect of weight shaved from the chassis. With an engineered density of 4.43 g/cm³ compared to 7.85 g/cm³ for structural steel, our Grade 5 titanium wheel bolts deliver a direct 45% reduction in unsprung rotational mass. For automotive performance tuners in Sofia and regional drag and drift series across Bulgaria, this yields improved suspension rebound response, razor-sharp steering turn-in, and lower rotational inertia during high-speed braking and acceleration.
Superior Tensile & Fatigue Endurance
Bulgarian regional road surfaces often exert intense cyclic shocks, pothole impacts, and vibrational strain on wheel studs and bolts. Cheap cast fasteners or cut-thread bolts suffer fatigue failure at thread roots. Yevzo titanium bolts feature precision hot-forged heads and continuous grain flow via cold-rolled threads, providing tensile strength exceeding 950 MPa and yield strength beyond 880 MPa. They surpass Class 10.9 steel safety thresholds while preserving remarkable elastic compliance.
Technical Comparison: Grade 5 Titanium vs. Automotive Fastener Steels
| Metallurgical Property | Ti-6Al-4V Grade 5 (Yevzo Specs) | Automotive Steel Class 8.8 | Automotive Steel Class 10.9 | Impact on Bulgarian Operating Profile |
|---|---|---|---|---|
| Density (g/cm³) | 4.43 g/cm³ (44% Lighter) | 7.85 g/cm³ | 7.85 g/cm³ | Decreases unsprung inertia; reduces fuel consumption and suspension wear. |
| Ultimate Tensile Strength (MPa) | 950 – 1050 MPa | 800 MPa | 1040 MPa | Matches or surpasses Class 10.9 racing bolt shear and clamping integrity. |
| Yield Strength (Rp 0.2, MPa) | 880 – 920 MPa | 640 MPa | 940 MPa | Prevents thread stretching under severe thermal expansion during track/mountain braking. |
| Thermal Expansion (10⁻⁶/K) | 8.6 (Ultra-Stable) | 11.7 | 11.5 | Prevents bolt loosening and thermal creep between alloy rims and cast-iron hubs. |
| Corrosion Mechanism | Immune (TiO₂ Passivation) | Rusts if plating scratches | Prone to stress cracking & rust | Zero degradation from winter de-icing salts or marine air along the Black Sea coast. |
| Thread Formation Standard | Precision Cold Rolled Class 6g | Cut or stamped | Rolled | Eliminates micro-notches, dramatically boosting dynamic fatigue cycles. |
Macro Trends & Opportunities
Emerging Automotive & Industrial Trends in Bulgaria
Analysis for commercial directors, performance import wholesalers, and procurement engineers operating within the Bulgarian automotive landscape.
Booming Premium EV & Hybrid Adoption
The Sofia municipality and urban centers across Bulgaria are experiencing rapid growth in performance EV registrations, notably Tesla Model S/X/3, Porsche Taycan, Audi e-tron, and BMW i-series. These vehicles exert heavy curb weights and deliver instant torque directly through wheel hubs. Upgrading to aerospace-grade titanium lug bolts and studs delivers vital unsprung weight relief, offsetting massive battery weights while meeting structural shear criteria.
Motorsport & Hillclimb Engineering
Bulgaria hosts a rich culture of mountain hillclimb championships, time-attack cups, and rally circuits (such as Rally Bulgaria and Mountain Climb Championship series). Privateer teams and independent race engineers are transitioning from steel conversion studs to one-piece custom forged titanium lug studs. They demand exceptional heat dissipation away from carbon-ceramic and performance iron disc brake packages during mountain descents.
EU Direct Supply Logistics & Nearshoring
With Bulgaria operating within the EU Single Market, local distributors require compliant import paperwork, clear customs harmonized system codes (HS 8108.90), and mill certificates (EN 10204 3.1) to avoid non-tariff delays. By partnering with our direct factory in Baoji, Bulgarian importers secure stable container freight or express air cargo (Sofia Airport - SOF) with guaranteed lot-to-lot consistency and transparent batch tracing.
Integrated Production Power
Direct Factory in Baoji's "Titanium Valley"
Established in 2013, Yevzo Titanium Metal Co., Ltd. operates at the epicenter of China's primary non-ferrous metal cluster in the Baoji High-Tech Development Zone. Our geographic advantage provides direct upstream integration with raw titanium sponge melting and ASTM B348 certified ingot bar production facilities.
Unlike trading intermediaries, every titanium wheel bolt, lug nut, and custom CNC racing component is forged, machined, threaded, and QC-inspected inside our own workshops. We implement 100% thread gauge verification using calibrated digital optical comparators and micrometer systems.
Onsite Verified
TUV / SGS Audited
Custom Threading
Metric / UNF / UNC
Finish Variety
Plain, Burnt, PVD
Traceability
Heat Lot MTR 3.1
Procurement & Technical Support
Frequently Asked Questions by Bulgarian Sourcing Managers
Direct metallurgical and operational answers addressing customs, installation, torque specifications, and corrosion management for the Bulgarian market.
How do titanium wheel bolts perform under Bulgarian road salt and winter chemicals?
Unlike carbon steel fasteners that rely on cosmetic zinc electroplating or Dacromet coatings (which inevitably chip during impact wrench tightening), Grade 5 Titanium (Ti-6Al-4V) does not rust. In contact with oxygen, titanium forms a spontaneous, non-porous, and stable titanium oxide (TiO2) barrier film. When exposed to calcium chloride, road magnesium, and saline melting agents used across Bulgaria's motorway network during sub-zero winters, our fasteners remain entirely immune to pitting, cosmetic rust bleed, and structural oxidation.
What torque specification should be applied to titanium wheel bolts on alloy rims?
Titanium features a lower modulus of elasticity compared to steel (~110 GPa vs ~210 GPa), requiring strict adherence to proper tightening procedures. We advise torquing titanium wheel lug bolts to OEM specified ratings (typically 120–140 Nm for M14x1.5 depending on manufacturer specs such as VAG, BMW, or Mercedes-Benz), utilizing a calibrated torque wrench rather than uncontrolled pneumatic impact guns. Furthermore, a high-grade titanium anti-seize paste (containing copper, graphite, or ceramic solids) must be applied to the threads and seating surface to standardize the friction coefficient (μ ≈ 0.12 - 0.14) and eliminate thread galling.
What seat configurations do you machine for aftermarket and OEM Bulgarian wheels?
We manufacture all primary global seating geometries: 60-degree Conical/Cone seats (standard on BBS, OZ Racing, Enkei, and aftermarket applications), Radius/Ball seats (R12, R13, and R14 specifically engineered for OEM Audi, VW, Porsche, and Mercedes rims), as well as floating flat-collar washer designs for Peugeot, Citroën, and specific Japanese applications. All seat faces are micro-turned to an ultra-smooth Ra ≤ 0.8 μm finish to guarantee uniform contact pressure distribution across the wheel rim socket.
What are the shipping times, incoterms, and customs procedures for deliveries to Bulgaria?
We regularly service automotive clients in Sofia, Plovdiv, Ruse, and coastal maritime hubs. We support DDP (Delivered Duty Paid), DAP, CIF (Varna or Burgas ports), and FOB terms. Bulk manufacturing orders typically ship in 15–22 business days, followed by air freight directly to Sofia Airport (SOF) within 5–7 days or ocean freight via container liners within 28–35 days. Every shipment includes certified Mill Test Reports (MTR) according to EN 10204 3.1, standardized commercial packing lists, and correct HS classification (8108.9000) for seamless EU customs clearance.
Can our engineering shop order custom lengths for hub wheel spacers?
Yes. Custom shank lengths represent one of our primary OEM strengths. If your Bulgarian workshop installs 5mm, 10mm, 15mm, or 20mm wheel spacers, we can machine custom shank lengths (such as M14x1.5 with 35mm, 42mm, 48mm, or 55mm shanks). We offer both 1-piece forged bolts and two-piece floating collar studs designed to absorb misalignment and prevent stress concentrations on spacer plates.
How does Yevzo prevent thread galling between titanium and hub materials?
Galling occurs when micro-asperities on dry metal surfaces adhere under high friction and pressure. To avoid this, our titanium threads are precision cold-rolled with mirror-smooth root contours. Secondly, we offer specialized Physical Vapor Deposition (PVD) titanium nitride or black Diamond-Like Carbon (DLC) low-friction coatings. In combined application with recommended anti-seize lubricants, thread friction is stabilized throughout hundreds of wheel removal cycles.
Direct Mill & Factory Partner for Bulgaria Fasteners
Looking to elevate your product line with aerospace-grade Grade 5 Titanium wheel bolts, titanium hub studs, and custom racing hardware? Request our complete technical specification guide, DIN/ISO tolerance sheets, and container or small-batch wholesale price schedules.
Request Technical Specifications
- Full DIN/ISO Drawing & Dimension Sheets
- Raw Material Batch Mill Certificates (EN 10204 3.1)
- Custom Shank Length & Thread Pitch Support
- Flexible MOQ for Workshop Trials & Master Importers