DIN Standard Metric
High Strength M4-M5 Titanium Torx Hex Washer Self-Tapping Screws
- MaterialTi-6Al-4V Gr5
- StandardDIN Metric
- CoatingAnodized / PVD
- Yield Strength≥ 825 MPa
Precision Fastening Components
High-Performance Titanium Motor Fastener Portfolio
Engineered to DIN, ISO, and UNF standards from aerospace-grade Grade 5 (Ti-6Al-4V) titanium bar stock, delivering 44% mass reduction and exceptional tensile endurance for high-stress motor assemblies.
Engine Sump & Case
M14 Titanium Gr5 Engine Drain Plugs & Motor Hardware
- MaterialTi-6Al-4V Gr5
- Thread PitchM14 × 1.25 / 1.5
- DrivePrecision Hex Head
- Corrosion ClassC5 High-Resistant
UNF Thread Series
Anodized GR5 Titanium Hex Flange Bolts (M8/M10 UNF)
- MaterialTi-6Al-4V Gr5
- Thread TypeUNF Fine Thread
- DesignIntegral Flange
- ToleranceISO 6g / Class 2A
DIN Metric Flange
GR5 Titanium Alloy M8/M10 Metric Hex Flange Motor Screws
- MaterialTi-6Al-4V Gr5
- StandardDIN 6921 Metric
- Tensile≥ 895 - 1050 MPa
- ApplicationMotor Mounts & Stator
Anti-Camout Torx
GR5 Anodized Titanium Torx Head M6 Motor Fairing Screw
- MaterialTi-6Al-4V Gr5
- Drive StyleTorx T30 Internal
- FinishElectrolytic Anodizing
- Surface HardnessHV 340-380
Open Flange Nut
GR5 Hexagon Flange Open Nut M8/M10 Right-Hand Thread
- MaterialTi-6Al-4V Gr5
- StandardDIN 6923 Metric
- FinishPlain CNC / Anodized
- Proof LoadEquivalent Cl. 10.9
Heavy-Duty Metric
Metric M5×15 Grade 5 Titanium Alloy Flange Bolts
- MaterialTi-6Al-4V Gr5
- DimensionsM5 × 15 mm
- Thread Pitch0.8 mm Rolled Thread
- Fatigue Life> 2 × 10&sup6; Cycles
Custom CNC Engineering
Custom M31 Ultra-Light CNC Titanium Motor Enclosure Cap
- MaterialTi-6Al-4V Gr5
- Knurl StyleAnti-Skid Ergonomic
- Weight Cut52% vs. Brass/Steel
- SealingFluorosilicone Groove
Metallurgical Authority & Design Criteria
Engineering Grade 5 Ti-6Al-4V for High-Dynamic Electric Motors
A rigorous metallurgical evaluation comparing aerospace-certified Grade 5 titanium fasteners against German industrial standard fastener alloys used in Hessen's mobility clusters.
Mechanical Baseline Comparison: DIN EN ISO Fastener Classes
In high-torque electric propulsion motors and compact stator-rotor assemblies, fastener mass directly affects rotational inertia and acoustic vibration harshness (NVH). The mechanical properties below demonstrate why Frankfurt mechanical design engineers are systematically transitioning from standard DIN 912 Class 8.8 and 10.9 steels to rolled-thread Ti-6Al-4V (Grade 5).
| Property Designation | Ti-6Al-4V (Grade 5 Fasteners) | DIN 8.8 Carbon Steel | DIN 10.9 Alloy Steel | A4-80 Stainless (1.4401) |
|---|---|---|---|---|
| Density (ρ) | 4.43 g/cm³ | 7.85 g/cm³ | 7.85 g/cm³ | 8.00 g/cm³ |
| Tensile Strength (Rm) | 895 – 1,050 MPa | 800 MPa | 1,040 MPa | 800 MPa |
| Yield Strength (Rp0.2) | ≥ 828 MPa | 640 MPa | 940 MPa | 600 MPa |
| Specific Strength (Strength/Density) | 214 kN·m/kg | 102 kN·m/kg | 132 kN·m/kg | 100 kN·m/kg |
| Modulus of Elasticity (E) | 114 GPa (Superior Damping) | 210 GPa | 210 GPa | 193 GPa |
| Magnetic Permeability (μr) | ≈ 1.00005 (Non-Magnetic) | Ferromagnetic (> 100) | Ferromagnetic (> 100) | 1.015 (Marginal Parasitic Eddy) |
| Fatigue Limit at 107 Cycles | 510 MPa (Rolled Threads) | 350 MPa | 420 MPa | 280 MPa |
Key Engineering Takeaway for E-Mobility Motor Architects: Ti-6Al-4V fasteners exhibit an exceptionally low relative magnetic permeability (μr ≈ 1.00005). When securing permanent magnet brushless DC (BLDC) motor rotor laminations or high-density stator stacks, titanium fasteners eliminate parasitic eddy current induction loops and magnetic field distortion, resulting in measurable stator core temperature reductions and efficiency gains of 0.8% to 1.4% in high-frequency PWM inverters.
Hessen & Rhine-Main Engineering Ecosystem
Localized Industrial Application Scenarios in Frankfurt
Serving precision design bureaus, tier-1 driveline contractors, airport ground machinery engineers, and custom performance builders across Frankfurt am Main, Darmstadt, Offenbach, Hanau, and Rüsselsheim.
E-Drive & Powertrain R&D (Rüsselsheim/Frankfurt)
Within the automotive research corridors of the Frankfurt Rhine-Main basin, powertrain engineering centers deploy our DIN 6921 M8 and M10 Grade 5 titanium flange bolts to fasten traction motor casings and integrated drive axles. The mass reduction lowers un-sprung wheel assembly inertia, directly extending vehicle range while withstanding high-vibration harmonic loads without tensile relaxation.
Industrial Robotics & Servo Automation (Darmstadt)
Automated manufacturing systems along the Hessian industrial spine utilize high-speed multi-axis articulated robots. Incorporating custom CNC Grade 5 M4 and M5 Torx cap screws into high-acceleration servo motors diminishes joint rotational momentum by 40%. This yields higher directional positioning accuracy (±0.005 mm), decreased actuator heat dissipation, and prolonged gearhead lifespan.
Frankfurt Airport (FRA) Ground Support & GSE Electrification
As Europe's primary logistics hub, Frankfurt Airport demands zero-emission electric ground support equipment (e-GSE). Operating continuously in harsh outdoor climates subject to de-icing glycols and saline wash downs, our anodized and PVD-treated titanium motor bolts and open flange nuts prevent galvanic seize-up and eliminate stress corrosion cracking on electric tugs, conveyors, and lift drives.
Dynamic Fatigue Resistance & Thread-Rolling Excellence
In standard machined fasteners, cut threads create microscopic notch stresses at the thread root, facilitating fatigue fracture initiation under cyclic shear loads. At our Baoji specialized facility, all Grade 5 titanium bolts destined for Frankfurt engineering procurement undergo cold thread-rolling following precision CNC shank machining.
Thread rolling preserves continuous, unbroken grain flow along the root radius rather than interrupting grain boundaries. This specialized fabrication process elevates fastener surface hardness at the thread root by up to 18% via work hardening and increases dynamic fatigue endurance beyond 2 × 106 cycles under 480 MPa fluctuating tensile load. This reliability standard satisfies the stringent structural mandates of German DIN EN 9100 aerospace and automotive VDA 6.1 quality philosophies.
Procurement Market Dynamics
German Manufacturing Trends & Frankfurt Trade Logistics
Analyzing the confluence of EU decarbonization policy, German industrial lightweighting initiatives, and high-velocity freight integration via Frankfurt Airport CargoCity.
Direct Baoji Titanium Valley Origin
By producing directly in Baoji, China—where over 60% of global industrial titanium sponge is refined and hot-worked—we deliver end-to-end metallurgical traceability from melt ingot heat number to packaged carton, entirely bypassing intermediary European trading markups.
EN 10204 3.1 Certified Compliance
German engineering auditors demand documented proof of composition and performance. Every batch consigned to Hessen is delivered alongside verified EN 10204 Type 3.1 inspection certificates documenting chemical spectrometry (Al, V, Fe, C, N, H, O limits) and optical tensile verification.
Air Freight Express to FRA CargoCity
Leveraging direct air cargo connectivity between Xi'an / Shanghai hubs and Frankfurt am Main (FRA CargoCity South), our rapid production stream completes 3-day sample dispatch and standard bulk lot consignments within 48 to 72 hours transit time, supporting Just-In-Time (JIT) manufacturing.
ESG & Circular Supply Traceability
Aligning with Germany's Lieferkettensorgfaltspflichtengesetz (Supply Chain Due Diligence Act), our closed-loop titanium scrap recycling and eco-conscious anodizing processes minimize chemical wastewater, delivering verifiable low-carbon hardware to meet OEM sustainability targets.
Surface Passivation, Anodizing & PVD Friction Management
A primary failure mode encountered by automotive assembly technicians working with raw titanium hardware is thread galling (cold-welding) when driven under high-speed pneumatic tooling. Uncoated titanium forms a microscopic native oxide layer that, under acute frictional contact pressure without adequate lubrication, can shear and bond to mating internal threads.
To eliminate galling in Frankfurt automated assembly lines, our manufacturing line integrates advanced surface modification options:
- Electrolytic Color Anodizing (Type II): Controlled micro-arc electrolytic treatment thickens the passive TiO2 barrier, yielding distinct chromatic color coding (Burnt Rainbow, Deep Gold, Cobalt Blue, Ultraviolet) for rapid assembly error-proofing (Poka-Yoke) while improving anti-seize characteristics.
- Physical Vapor Deposition (PVD) Titanium Nitride / DLC Coating: Deposited in vacuum chambers at high ionization rates, our PVD Black and Gold coatings produce an ultra-hard surface shell (2,500 – 3,000 Vickers) with a kinetic friction coefficient of μ ≤ 0.15 against steel and aluminum tapped holes, eliminating thread galling even in dry torquing protocols.
For uncoated raw aerospace finishes, we supply tailored anti-seize torque application tables, ensuring consistent clamp load conversion and preventing joint loosening under intense thermal cycle excursions (-40°C to +380°C).
Why Global Buyers Partner with Us
World-Class Manufacturing Capabilities: The Zunvo Advantage
Founded in 2015 in Baoji, China's Titanium Valley, Zunvo Titanium Products Co., Ltd. combines raw material sovereignty, precision Japanese CNC multi-axis turning, and rigorous metrology.
End-to-End Metallurgical Sovereignty
Situated within the Shiling Road Industrial Park in Baoji, we maintain immediate proximity to primary titanium smelting centers. Every production lot of Ti-6Al-4V Grade 5 is sourced as vacuum arc remelted (VAR) billet, ensuring zero hydrogen embrittlement, ultra-clean microstructure, and absolute heat-lot traceability.
5-Axis CNC Precision & Custom Tooling
Operating high-speed 5-axis CNC Swiss-type lathes and dedicated multi-die cold and warm heading machinery, our machining tolerances reliably meet ±0.005 mm. We support custom CAD/STEP print manufacturing for specialized motor caps, hollowed drive studs, and non-standard thread pitches.
100% Quality Assurance Protocol
Our quality verification pipeline incorporates 3D Coordinate Measuring Machines (CMM), optical shadow projectors for thread flank inspection, and Class 6g/6H Go/No-Go thread gages. Backed by a verified 66% reorder rate and a 4.9/5 buyer rating, we guarantee zero-defect dispatches to European ports.
Rapid 3-Day Prototyping Pipeline for German Engineering Teams
We recognize that product design cycles in Frankfurt's fast-moving high-tech sectors cannot accommodate multi-week tooling lead times. Our rapid prototyping division is calibrated to transition your CAD drawings into physical, surface-finished Grade 5 samples in as few as 3 business days.
Whether your engineering project requires an M14 oil drain plug with integrated rare-earth neodymium magnets, customized knurled motor enclosure caps, or titanium Torx fasteners with internal cooling oil cross-drillings, our engineering desk reviews design for manufacturability (DFM) within 7 hours, offering real-time technical dialogue via digital channels.
Purchasing & Technical Clarifications
Frequently Asked Questions: Frankfurt Procurement & Engineering
Clear, definitive answers addressing regulatory compliance, torque specifications, customs clearances at Frankfurt Airport, and batch minimums for German industrial buyers.
Can Grade 5 (Ti-6Al-4V) titanium bolts directly replace DIN 10.9 steel fasteners in electric motor assemblies?
Yes, in the vast majority of motor enclosure, mount, and dynamic casing locations. Ti-6Al-4V fasteners deliver a minimum tensile strength of 895 to 1,050 MPa and yield strength exceeding 828 MPa, which directly matches the proof load requirements of DIN 8.8 and closely approximates DIN 10.9 specifications while shedding 44% of the fastener weight. However, because titanium’s modulus of elasticity (114 GPa) is roughly half that of carbon steel (210 GPa), our engineers provide customized torque-tightening recommendations (typically requiring a 15% to 20% reduction in tightening torque compared to dry steel) to achieve the exact target clamping force without joint over-elongation.
How are customs duties and import clearance managed when shipping to Frankfurt am Main?
Shipments entering Germany are cleared under EU Common Customs Tariff codes for titanium hardware (predominantly HS Code 8108.90 or HS Code 7318 depending on final assembly classification). We supply commercial invoices, packing lists, and certified certificates of origin to expedite release through the German Customs Authority (Zollamt) at Frankfurt Airport CargoCity. When shipped via express air partners (DHL Express, FedEx, UPS), customs clearance is processed electronically prior to aircraft landing, ensuring direct, frictionless transit straight to your facility dock in Hessen.
What metallurgical documentation is provided to satisfy German IATF 16949 / VDA requirements?
Each consignment is shipped with a comprehensive EN 10204 Type 3.1 Mill Test Certificate (MTC) linked directly to the melt ingot heat number. The certificate details chemical composition verified via optical emission spectrometry, mechanical tensile properties (tensile strength, yield proof stress, elongation at break), hardness testing (Rockwell C / Vickers), and microstructural grain sizing. We also provide initial sample inspection reports (ISIR) and 3D CMM inspection data upon request for PPAP level documentation.
How does your factory prevent thread galling during high-speed automated production line assembly?
To prevent cold-welding during robotic assembly, we offer two primary manufacturing solutions:
1. PVD DLC or TiN thin-film coating: Provides an ultra-low friction barrier (μ ≤ 0.15) that eliminates mechanical contact seizure between titanium and aluminum internal threads.
2. Specialized anti-seize pre-coatings: For uncoated titanium parts, we recommend molybdenum disulfide (MoS2) or nickel-based anti-seize paste, and we can pre-apply micro-encapsulated thread-locking or anti-friction compounds to your specifications.
1. PVD DLC or TiN thin-film coating: Provides an ultra-low friction barrier (μ ≤ 0.15) that eliminates mechanical contact seizure between titanium and aluminum internal threads.
2. Specialized anti-seize pre-coatings: For uncoated titanium parts, we recommend molybdenum disulfide (MoS2) or nickel-based anti-seize paste, and we can pre-apply micro-encapsulated thread-locking or anti-friction compounds to your specifications.
What are your Minimum Order Quantities (MOQ) and production lead times for custom prints?
For standard catalog items (DIN 912, DIN 6921, standard Torx tapping screws), our minimum batch typically starts at 100 to 200 units, allowing engineering teams to validate prototypes affordably. For completely custom CNC parts manufactured from client 2D/3D CAD drawings (STEP, IGES, DWG), initial validation orders start at just 100 pieces. Standard rapid sampling is completed in 3 to 5 working days, with bulk manufacturing runs dispatching within 7 to 15 days depending on secondary surface finishing requirements.
Does your titanium supply comply with European REACH and RoHS environmental directives?
Completely compliant. Ti-6Al-4V Grade 5 is an elemental titanium alloy composed of titanium, aluminum, and vanadium with negligible trace iron and interstitial elements (oxygen, nitrogen, carbon, hydrogen). It is 100% free of lead, cadmium, mercury, hexavalent chromium, and hazardous polybrominated biphenyls, fully adhering to EU RoHS 2011/65/EU and REACH (EC 1907/2006) regulations for clean, non-toxic industrial equipment.
