Titanium Hub Bolts Factories & Exporter for the Paris Market

Yes, provided correct engineering design parameters are observed. Grade 5 (Ti-6Al-4V) displays a yield strength ($R_{p0.2}$) of 880–950 MPa and an ultimate tensile strength ($R_m$) of 950–1,050 MPa, which directly aligns with the mechanical envelope of ISO 898-1 Class 10.9 steel ($R_m = 1,000\text{ MPa}$, $R_{p0.2} = 900\text{ MPa}$). However, due to titanium's lower modulus of elasticity, the bolt must not be substituted into joints calculated for Class 12.9 without thread sizing review. For standard passenger and racing wheel hubs with M12 and M14 configurations, Velnora titanium wheel bolts provide equivalent mechanical clamping capacity alongside a 44% reduction in weight.

Galling (cold welding) is caused by micro-asperities tearing the passive oxide film under high contact pressures. Velnora mitigates this via three strict processes: First, threads are cold-rolled rather than single-point cut, achieving a micro-finish roughness of $Ra \le 0.4\ \mu m$. Second, we offer PVD (Physical Vapor Deposition) Titanium Nitride (TiN) or Diamond-Like Carbon (DLC) hard barrier coatings with low friction coefficients. Third, we specify and supply aerospace-grade copper or molybdenum disulfide anti-seize paste, and provide torque reduction calculation tables ($k$-factor adjustments) for accurate preload verification.

Under French and EU TARIC nomenclature, titanium screws and bolts are imported under HS Code 8108.90.90. Standard B2B commercial shipments require a Commercial Invoice, Packing List, Air Waybill (AWB), Certificate of Origin (CO), and Mill Test Certificate (EN 10204 3.1). Velnora commonly operates under DDP (Delivered Duty Paid) Incoterms for Parisian boutique studios, handling French import VAT and clearance, or under FCA / FOB / CIF for registered French enterprises possessing an EORI tax number.

Fully compatible. We machine our threads to ISO 965-2 6g medium fit standards. We regularly produce standard European fitments including M14x1.5 (VAG, Porsche, Mercedes-Benz, Renault Sport), M14x1.25 (Modern BMW, Mini), and M12x1.25 (Alfa Romeo, Stellantis platforms). Both traditional 60-degree conical taper seats, R12/R13/R14 spherical radius seats, and two-piece floating washer designs are available to prevent rim galling and uneven lug seat loading.

For standard catalogue items and stocked profiles, our MOQ begins at 100 to 200 pieces per specification (suitable for 5 to 10 vehicle conversions). For custom engineered designs requiring bespoke CNC tooling setups or tailored laser etching, initial pilot trial batches can start at 50 to 100 units. Full production runs scale to tens of thousands of units with scheduled rolling delivery schedules.

Titanium anodizing is an electrochemical process that grows the natural transparent titanium dioxide ($TiO_2$) crystal layer; it contains no organic dyes or pigments. Colors (gold, purple, blue, rainbow) emerge through optical wave interference. Unlike painted aluminum, this oxide film cannot chip, flake, or peel. For severe industrial, winter-road, or wheel-cleaner acid exposure, we also provide PVD physical vapor deposition coating (yielding deep metallic black or true gold) which rates above 2,500 Vickers hardness, offering exceptional scratch and chemical resistance.

Every production lot leaves our factory accompanied by a comprehensive Quality Dossier. This includes: 1) Spectrometer chemical analysis verifying TC4 / Gr5 composition; 2) Tensile test curve and Rockwell hardness (HRC) records; 3) Coordinate Measuring Machine (CMM) dimensional tolerance audit; 4) Go/No-Go thread gauge ring verification records; and 5) High-definition in-process machining photography and final packaging inspection video files sent directly to the client's engineering desk.