Gr5 · PVD
Titanium Torx Head Motorcycle Bolt Class 8.8 Gr5 Star Screw
- Standard: Custom / DIN Standard
- Grade: Ti-6Al-4V (Grade 5)
- Drive Type: Torx / Star Drive
- Tensile Strength: ≥ 895 - 1000 MPa
Precision Catalog
High-Performance Titanium Socket Bolts Portfolio
Engineered for lightweighting, exceptional corrosion resistance, and fatigue life under extreme cyclic vibration. Browse our key series machined from ASTM B348 certified bar stock.
Anodized
Gr5 Anodized Colored Torx Bolts M4 M5 M6 Car Shell Screws
- Sizes: M4, M5, M6 × 15mm+
- Coating: Hard Anodized Oxide
- Corrosion Rate: Near Zero in Saline
- Weight Saving: ~44% vs. Steel
Large Cap
Large Cap Head Hex Screws Fairing Bolts for Modification
- Head Design: Low Profile Large Cap
- Surface: Plain / Burnt Rainbow
- Load Area: Expanded Flange Profile
- Application: Aero Panels & Fairings
OEM Star
M8 Titanium Torx Head Motorcycle Bolt Gr5 CNC Star Screw
- Diameter: M8 Thread Metric
- Tolerance: ISO 6g / DIN 13-6
- Process: Multi-Axis CNC Machining
- Customization: Laser Etched Branding
Bright Finish
M5 M6 M8 Titanium Alloy Hexagon Stem Screws Supply
- Standard: DIN 912 Compatible
- Finish: Mirror Bright Polished
- Yield Strength: ≥ 828 MPa
- Sector: Precision Cycle & Racing
Brake Disc
Titanium Brake Disc Bolt M6 × 20mm High-Shear Screw
- Size: M6 × 20mm Pitched
- Safety Class: High Shear Fatigue Rated
- Feature: Anti-Loosening Seating
- Application: Rotor & Caliper Mounts
DIN 912
DIN912 M6 Burnt Blue Titanium Socket Head Cap Screw
- Specification: DIN 912 / ISO 4762
- Aesthetics: Thermal Burn Anodized
- Density: 4.43 g/cm³
- Field: E-Mobility & Performance EBikes
Wholesale Gr5
Wholesale GR5 DIN912 Titanium Hex Socket Bolts Custom
- Dimensions: M3 to M24 Full Range
- Inspection: 100% Optical Thread Check
- Customization: Drawing Based Turning
- Market: Industrial & Motorsport Fasteners
Technical Authority
Engineering Grade 5 (Ti-6Al-4V) Socket Bolts: Metallurgical Superiority
Why Tier-1 industrial buyers replace 304/316 stainless steel and Class 8.8-10.9 alloy steels with Grade 5 Titanium for structural fastener applications.
Strength-to-Weight Optimization
Grade 5 titanium possesses a density of roughly 4.43 g/cm³, achieving a 44% mass reduction compared to alloy steel (7.85 g/cm³). In rotational dynamic components like brake rotors and wheel hubs, reduced unsprung weight dramatically improves gyroscopic response, fuel efficiency, and vibrational damping.
Spontaneous Passivation
Unlike carbon steel which requires cad-plating, zinc flake, or galvanization, titanium forms an instantaneous, tenacious titanium dioxide (TiO&sub2;) layer upon exposure to air or moisture. It displays complete immunity to chlorides, pitting, and marine atmospheric stress corrosion cracking.
Fatigue Life & Cold Thread Rolling
Standard fasteners cut with dies suffer micro-tears along root radiuses. Yevzo utilizes high-tonnage cold rolling techniques on unthreaded shanks, generating continuous grain flow paths that elevate cyclical fatigue limits past 10 million cycles under pre-load conditions.
| Mechanical / Physical Property | Commercial Grade 2 (CP-Ti) | Aerospace Grade 5 (Ti-6Al-4V) | Class 8.8 High-Tensile Steel | A2-70 (304 Stainless Steel) |
|---|---|---|---|---|
| Ultimate Tensile Strength (Rm) | ≥ 345 MPa | ≥ 895 - 1000 MPa | 800 MPa | 700 MPa |
| Yield Strength (Rp 0.2) | ≥ 275 MPa | ≥ 828 MPa | 640 MPa | 450 MPa |
| Density (g/cm³) | 4.51 | 4.43 | 7.85 | 7.93 |
| Modulus of Elasticity (GPa) | 105 | 114 | 210 | 193 |
| Thermal Expansion (10⁻⁶/K) | 8.6 | 8.6 | 12.2 | 16.0 |
| Chloride Pitting Resistance | Complete Immunity | Complete Immunity | Severe Corrosion | Susceptible to Crevice Pitting |
*Data verified in accordance with ASTM B348, ISO 898-1, and ISO 3506-1 standards.
Procurement Intelligence
Future Procurement Trends in Titanium Fastener Engineering
Market developments shaping industrial procurement strategies across North America, the European Union, and Asia-Pacific through 2030.
Electric Vehicle Lightweighting (EV Mass Reduction)
As battery packs impose hundreds of kilograms of parasitic tare weight, OEMs increasingly prioritize high-performance fastener substitution. Switching battery casing socket bolts, chassis linkages, and suspension pivots to Ti-6Al-4V extends driving range while lowering the center of gravity without compromising shear safety.
Digital Traceability & Raw Material Chain of Custody
Global supply chain compliance mandates end-to-end transparency. Procurement departments now strictly require Heat Treatment Certifications, EN 10204 3.1 Material Test Reports (MTR), and spectral batch chemical analysis directly tracing unworked ingots back to certified Baoji titanium sponge mills.
PVD & Functional Micro-Surface Coatings
Traditional electrochemical anodization is increasingly complemented by Physical Vapor Deposition (PVD). Advanced Titanium Nitride (TiN), Diamond-Like Carbon (DLC), and Chromium Nitride (CrN) vacuum deposits yield surface hardness ratings exceeding 2500 HV, eliminating micro-galling and thread seizure during high-rpm assembly.
Manufacturing Authority
Why Tier-1 Importers Partner with Yevzo Titanium
Operating from Baoji, China's "Titanium Valley" since 2013, Yevzo couples upstream material supply integration with precision machining infrastructure.
2013
Established in Baoji
100+
CNC & Turning Centers
1,000+
Global Industrial Clients
100%
Traceable Ingot Batches
Standardized Quality Assurance Workflow
1
Material Analysis
Optical emission spectrometer checks bar stock alloy ratios before sawing.
2
CNC Machining
High-precision turning for head configuration, socket broaching, and shank profiling.
3
Thread Rolling
Hydraulic thread rolling preserves metallurgical grain structures for fatigue strength.
4
Surface Treatment
Multi-stage degreasing, ultrasonic cleaning, PVD nitriding, or micro-anodizing.
5
Optical Sorting
Laser dimension gauging and vacuum blister packing preventing thread-on-thread impact.
Knowledge Base
Frequently Asked Questions for Titanium Socket Bolt Importers
Expert engineering insights addressing common design challenges, torque parameters, and customs logistics.
How do tightening torque values differ between Grade 5 Titanium and Steel?
Titanium has a lower modulus of elasticity (114 GPa vs. 210 GPa for steel), making it roughly twice as elastic under tensile preload. Always utilize torque specs tailored to titanium: typically 15% to 20% lower than a Class 10.9 steel bolt of equivalent shank diameter to avoid over-stretching the fastener, paired with an anti-seize paste to stabilize the friction coefficient (μ ≈ 0.10 - 0.12).
What measures eliminate galling (cold welding) during automated installation?
Galling occurs when friction shears away microscopic protective oxide films on mating threads, causing direct atomic bonding. To prevent cold welding: (1) apply MoS&sub2; or nickel-based anti-seize compounds, (2) select rolled rather than cut threads for smoother contact surfaces, or (3) specify physical vapor deposition (PVD TiN/DLC) or dry-film lubricating treatments.
Is galvanic corrosion a risk when coupling titanium bolts with aluminum housings?
Titanium is electrochemically noble (+0.05V), whereas aluminum is active (-0.90V). In wet, electrolytic environments (such as road brine or marine spray), the aluminum housing can act as a sacrificial anode. We recommend pairing fasteners with non-conductive insulating washers, zinc-nickel barrier coatings, or joint sealing paste to eliminate electrolyte bridging.
What minimum order quantities (MOQs) apply for custom blueprint runs?
Standard metric sizes (M4 to M12 socket bolts) maintain a low MOQ of 20 to 50 pieces due to stocked ASTM B348 bar inventories. Bespoke CNC geometries involving non-standard pitches, hollowed weight-relief heads, or specialized PVD coloring typically start at 100 to 200 pieces, backed by full 2D/3D CAD sample sign-offs.
Does anodizing degrade the thread pitch diameter or tolerance class?
No. Unlike heavy anodizing on aluminum which builds up measurable dimensional thickness, titanium color anodizing is an electrolytic optical refraction process. The transparent oxide layer generated is typically less than 200 nanometers thick, preserving 6g thread class clearances and critical wrench fitment tolerances.
Which Incoterms and documentation accompany export shipments?
We support FOB, CFR, CIF, CPT, and full door-to-door DDP arrangements via air courier or sea freight. Shipments include EN 10204 3.1 Material Test Reports (chemical & mechanical properties), ultrasonic raw material validation, dimensional inspection reports, and Commercial Invoices configured for regional customs clearance.
Direct Factory Collaboration
Request a Precision Manufacturing Proposal Within 24 Hours
Send your CAD models (STEP, DWG, PDF), fastener specifications, or target custom application details directly to our engineering desk. Gain factory-direct pricing from the heart of Baoji's Titanium Valley.
• Strict NDA protection | • ISO-standardized quality metrics | • Rapid international prototyping
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