Global procurement teams and mechanical design engineers face intensifying challenges in motorsport, aerospace, high-performance cycling, and marine infrastructure: balancing severe mass reduction with non-negotiable joint clamp integrity and extreme atmospheric corrosion resistance. Zunvo Titanium Products Co., Ltd. produces premium-grade Titanium Hex Flange Bolts (DIN 6921, ISO 4162, ASME B18.2.1) precision-machined and thread-rolled from certified Grade 5 Ti-6Al-4V titanium bar stock. By integrating a broad load-bearing flange directly beneath the hex driver, these bolts uniformly distribute dynamic tensile preloads, eliminate galling-prone independent washers, prevent embedment into delicate magnesium or carbon composites, and reduce assembly mass by 44% compared to standard alloy steel.
How progressive aerospace, automotive electrification, and high-performance racing platforms are revolutionizing their fastener sourcing strategies through semantic design and metallurgy.
Historically, low-volume custom titanium fasteners were fabricated by CNC single-point threading. Modern AI-assisted structural simulations reveal that thread cut profiles introduce dangerous microscopic stress risers and disrupt continuous longitudinal grain boundaries, fostering brittle notch-fatigue failure under heavy vibration. Today, Tier-1 purchasing teams mandate rolled threads. At Zunvo Titanium Products Co., Ltd., all GR5 Titanium Hex Flange Bolts utilize specialized high-pressure thread-rolling dies. This cold-work process compresses the crystalline lattice at thread roots and crests, increasing root hardness by up to 15% and boosting dynamic fatigue life by over 300% across severe cyclic loads.
While electrochemical color anodizing remains popular for aesthetic motorcycle customization and product color-coding, modern aerospace and e-mobility engineers demand functional physical vapor deposition (PVD). As lightweight designs place titanium bolts directly in contact with aluminum subframes, raw metal interfaces risk potential galvanic interaction in wet environments. Modern procurement specifications increasingly dictate PVD Titanium Nitride (TiN), Titanium Carbonitride (TiCN), or Diamond-Like Carbon (DLC). These thin ceramic films (1–3 µm) provide electrical insulation, eliminate micro-welding friction, slash thread galling, and provide superior scratch hardness up to 3000 HV.
The pursuit of unsprung mass reduction in MotoGP, Formula racing, and aero-gravel bicycles has driven the evolution of the "drilled and dished" flanged head design. Rather than flat DIN 6921 profiles, modern engineering contracts request race-spec recessed faces with drilled wire-locking holes along the hexagonal facets. These geometries save an additional 8–12% mass while enabling wire-locking security in high-vibration engine cradles, brake caliper mounts, and driveline assemblies.
In response to volatile raw titanium sponge prices and stringent ESG compliance, procurement leaders are abandoning spot-market brokers. Sourcing strategies are moving toward integrated manufacturers situated directly inside primary metallurgy zones. Located in Baoji—China's recognized "Titanium Valley"—Zunvo Titanium Products Co., Ltd. sources raw titanium from verified domestic melting ingots. Every production run is issued an authentic EN 10204 Type 3.1 Mill Test Certificate detailing chemical composition, yield strengths, elongation metrics, and ultrasonic flaw testing.
Replacing an M10x50 grade 10.9 steel hex bolt and washer assembly (approx. 48.5g) with a Zunvo GR5 Titanium Hex Flange Bolt (approx. 27.2g) yields an immediate 43.9% net mass savings without requiring washer seat preparation or compromising clamp stress integrity.
Precision-crafted components standardly stocked or custom manufactured to client technical blueprints with tight machining limits.
Flagship Product Integrated oversized collar eliminates washers, spreads axial clamping loads over delicate carbon fiber and aluminum motor mounts, and delivers non-magnetic performance. Available M5–M12.
High Demand Engineered for high-vibration motorcycle chassis, suspension linkages, and brake calipers. Fine thread pitch options (1.0mm / 1.25mm) with ultra-precise rolled thread runout.
Mating Fastener Companion DIN 6923 flange nuts with serrated or smooth contact bases. Guarantees uniform thermal expansion and prevents uneven galling across high-temperature exhaust connections.
Comparing structural characteristics provides engineering justification for retrofitting mission-critical assemblies with Zunvo titanium fasteners:
| Engineering Parameter | Zunvo GR5 (Ti-6Al-4V) | Class 8.8 Steel | Class 10.9 Steel |
|---|---|---|---|
| Density (g/cm³) | 4.43 (Lightweight) | 7.85 | 7.85 |
| Tensile Strength (MPa) | 895 – 1050 | 800 | 1040 |
| Yield Strength (MPa) | 828 – 950 | 640 | 940 |
| Strength-to-Weight Ratio | ~215 kN·m/kg | ~102 kN·m/kg | ~132 kN·m/kg |
| Corrosion Resistance | Impervious to Chlorides/Salt | Requires Zinc/Galv | Subject to Hydrogen Embrittlement |
| Magnetism | Completely Non-Magnetic | Ferromagnetic | Ferromagnetic |
Comprehensive manufacturing mastery in Baoji, China backed by verified business operations and dedicated engineering personnel.
Zunvo Titanium Products Co., Ltd. was established ten years ago in the world-renowned industrial hub of Baoji, China. Operating across a cutting-edge 1,000–3,000 m² machining center, we specialize exclusively in the technological research, precision CNC fabrication, and surface treatment of titanium alloy screws, motorcycle modification screws, nuts, bolts, titanium washers, titanium shaped parts, and ultralight titanium bicycle hardware.
Combining the direct technical control of a focused manufacturer with the logistical agility of a high-volume trading company, our facility manages annual export revenues between US$50 Million - US$100 Million. Over 101 to 200 skilled production technicians, metrology engineers, and sales experts ensure fast turnarounds, maintaining an independently validated 93.75% response rate and an inquiry response speed of ≤7 hours. Demonstrating our reliability in international supply chains, 66% of our overseas purchasers consistently reorder for their standard assembly runs.
Detailed technical, quality, and logistics questions commonly evaluated by enterprise procurement officers, design engineers, and tier distributors when sourcing Titanium Hex Flange Bolts.
A Titanium Hex Flange Bolt features a single integrated solid circular flange directly under the hex drive head. In high-vibration applications—such as automotive engine mounts, motorcycle swingarms, or marine bracketry—standard cap screws require separate washers that can rotate, slide, gall, or seat unevenly. The integrated flange doubles the contact surface area, substantially decreasing localized bearing stress on vulnerable parent materials like magnesium, aluminum alloys, and carbon composites. Furthermore, external hexagonal heads permit high torque delivery with standard socket tools in tight spaces where internal hex sockets could strip or pack with debris.
Although Grade 5 titanium possesses a tensile strength comparable to Property Class 8.8 and Class 10.9 steels, its Elastic Modulus (Young's Modulus) is approximately 110–114 GPa—roughly half that of carbon steel (~210 GPa). Consequently, titanium stretches more under identical clamp tensile stress. When tightening titanium flange bolts, engineers must apply calibrated torque using appropriate anti-seize lubricants (molybdenum disulfide, copper paste, or nickel grease). For most dry thread calculations, using steel torque values directly can result in bolt overstretching; calibrated assembly guidelines recommend tightening to approximately 75–85% of standard 8.8 steel torque unless specifically engineered for pre-load elongation.
Titanium readily forms an instantaneous micro-thin titanium dioxide film. Under high sliding friction and friction heating, this oxide film can shear off, causing cold welding or "galling" between interacting threads. Zunvo mitigates this at the root by using ultra-smooth thread rolling (achieving surface roughness Ra < 0.4 µm) instead of cutting, which eliminates microscopic burrs. For extreme applications, we offer advanced PVD coatings (such as DLC or TiAlN) or specialized dry-film micro-coatings that dramatically lower the thread friction coefficient and prevent friction welding during torque application.
Yes. As a direct manufacturer in Baoji with in-house tooling and precision multi-axis CNC lathes, we routinely manufacture bespoke configurations based on customer 2D/3D CAD drawings (STEP, DWG, PDF, IGES). Custom features include extra-wide or dished flange diameters, under-head lock serrations, cross-drilled safety wire holes through the hex flats, reduced unthreaded shanks for shear centering, and custom metric or imperial fine pitches (such as M10x1.0, M10x1.25, 3/8-24 UNF).
Catalog-standard Titanium Hex Flange Bolts (such as DIN 6921 M6, M8, M10 lengths) dispatch from our inventory within 24 to 48 hours. Custom CNC machined samples are completed within 3 to 5 business days. Scaled production runs generally ship within 7 to 15 business days following sample approval. For express delivery, we partner with DHL, FedEx, and UPS (3–5 day delivery worldwide), alongside air freight and ocean container consolidations for commercial orders destined for North America, Central America, the Middle East, and Southeast Asia.
We source certified titanium raw bar stock exclusively from accredited melting mills in Baoji. Each material heat is traceable and verified through spectral chemical analysis (verifying 5.5–6.75% Aluminum, 3.5–4.5% Vanadium, and strict interstitial element limits for Carbon, Nitrogen, Hydrogen, and Oxygen) and tensile mechanical testing. Mill test certificates complying with EN 10204 3.1 accompany our production documentation for quality assurance auditing.
Send your drawings or target part specifications to our engineering team in Baoji. We provide technical drawing reviews, manufacturing feasibility audits, and transparent factory quotations in less than 7 hours.
