DIN / GB Spec
Grade:Ti-6Al-4V Gr5
Threads:M6, M8, M10 Rolled
Tensile:≥ 950 MPa
Original Equipment & Fastener Series
Industrial & Micro-Grade Titanium Product Line
Direct from China's Titanium Valley to Granada: Certified standard & custom-turned titanium fasteners held to 0.005 mm micro-tolerances with full heat lot traceability.
12-Point Head
Standard:DIN 12-PT Standard
Sizing:M12 / M14 Precision
Application:Structural Clamping
TORX Drive
Tolerance:±0.005 mm
Head Style:Torx T25/T30 Drive
Surface:Vacuum PVD Coated
Low Profile
Diameter:M4, M5, M6, M8, M10
Finish:Mirror Micro-Polish
Feature:Low Clearance Profile
Pure Gr2/Gr9
Purity:ASTM B338 / Gr2
Wall:Thin Micro-Bore Stock
Quality:Eddy Current Tested
Brake Rotor
Yield Strength:≥ 828 MPa
Design:Deep Recess Hex
Application:Dynamic Cycling Hubs
Flat Flange
Base:Integral Washer Flange
Thread Pitch:1.25 mm Rolled Pitch
Weight Save:44% vs 10.9 Steel
CNC Precision
Thread:1/4-20 UNC Imperial
Process:Swiss Multi-Axis CNC
Drive:Tamper-Resist Torx
34+
Multi-Axis Swiss CNC Centers
±0.005mm
Machining Micro-Tolerance
M0.8 – M14
Micro to Structural Range
100%
CE MDR & EN 10204 3.1 Traceable
Technical White Paper
Metallurgical Precision & Micro-Fastener Architecture
An authoritative engineering assessment of titanium micro-screw performance, microscopic thread rolling parameters, shear biomechanics, and surface chemistry for critical assemblies in Granada.
| Alloy Grade & Designator | Yield Strength (Rp 0.2 MPa) | Tensile Strength (Rm MPa) | Elastic Modulus (GPa) | Elongation (%) | Primary Industrial Utility |
|---|---|---|---|---|---|
| Gr2 (Commercially Pure Ti) | 275 – 345 | 345 – 480 | 103 | ≥ 20% | Chemical sensors, optical housings, marine atmospheric instrumentation |
| Gr5 (Ti-6Al-4V TC4) | 828 – 910 | 895 – 1050 | 114 | ≥ 10% | Aerospace optics, synchrotron vacuum stages, cycling gear components |
| Gr23 (Ti-6Al-4V ELI / ASTM F136) | 795 – 860 | 860 – 965 | 110 | ≥ 12% | Maxillofacial implants, neurosurgical plates, dental abutment micro-screws |
| CoCrMo Alloy (ASTM F75) | 450 – 850 | 655 – 1170 | 210 – 250 | ≥ 8% | Prosthetic friction interfaces, orthopedic load-bearing joints |
Micro-Swiss Turning vs. Cold Thread Rolling
For fasteners below M3.0, single-point tool deflection creates severe pitch drift on lower-grade machines. Our factory utilizes multi-axis Citizen and Star CNC sliding-head Swiss lathes configured with high-pressure oil cooling to preserve continuous chip evacuation. Thread profiles on Grade 5 titanium micro-screws are formed through precision cold-rolling dies when geometry permits, inducing beneficial compressive residual stresses that increase fatigue endurance limits by up to 34% compared to cut threads.
Biocompatibility & Anodic Passivation
Serving medical device manufacturers in Granada's PTS ecosystem requires strict control over interstitial elements. Our Grade 23 (Ti6Al4V ELI per ASTM F136 and ISO 5832-3) restricts oxygen (≤ 0.13%) and iron (≤ 0.25%) content, elevating fracture toughness and minimizing notch sensitivity. Every batch undergoes ultrasonic multi-stage degreasing and Type II nitric/citric acid passivation (per ASTM F86), establishing a chemically inert TiO2 oxide layer that prevents ion leaching in human tissue environments.
Non-Magnetic Cryogenic Stability
Titanium exhibits relative magnetic permeability (µr) below 1.00005, making it essentially invisible to magnetic resonance imaging (MRI) and ultra-sensitive magnetometer arrays. In cryogenic applications down to 4 Kelvin (-269°C), Ti-6Al-4V retains exceptional structural integrity without encountering the ductile-to-brittle transition temperature typical of standard austenitic or martensitic steels, serving the cryogenic instrumentation deployed across Sierra Nevada observatories.
Regional Industrial Integration
Precision Titanium Micro-Screws Serving Granada
Connecting China's premier titanium manufacturing infrastructure directly with the Andalusia technology corridor, from biomedical campuses to high-altitude astrophysical laboratories.
Parque Tecnológico de la Salud (PTS)
Biomedical Micro-Plates & Maxillofacial Devices
Granada’s PTS stands as one of Southern Europe’s foremost hubs for health sciences, medical biotechnology, and clinical biomechanics. Our factory manufactures CE-marked Ti6Al4V ELI micro-screws (M1.2, M1.5, M2.0) with cruciform, square, and Torx drives. Engineered for craniomaxillofacial reconstructive plates, spinal mini-cages, and orthopedic osteosynthesis, our screws provide optimal bone-to-implant contact ratios, non-toxic osseointegration, and strict micro-burr elimination under 100x optical microscopy.
Astrophysics & Sierra Nevada OSN
Cryogenic Optical Enclosures & Spectrographs
The Instituto de Astrofísica de Andalucía (IAA-CSIC) and the Sierra Nevada Observatory (OSN at 2,896m altitude) pioneer high-resolution astronomical instrumentation. Micro-screws utilized in cryogenically cooled focal plane cameras and diffraction grating assemblies must survive severe thermal cycling without loosening or galling. Our Gr5 low-profile micro-screws feature rolled micro-threads and PVD-deposited molybdenum disulfide or tungsten carbide dry-film coatings for zero-outgassing vacuum reliability.
Big Science: IFMIF-DONES Escúzar
Ultra-High Vacuum & Beamline Modules
The construction of the IFMIF-DONES (International Fusion Materials Irradiation Facility - Demo Oriented NEutron Source) facility in Escúzar, Granada represents a landmark in nuclear fusion materials research. Beamline alignment sensors, collimator housings, and ultra-high vacuum (UHV) diagnostic instrumentation mandate non-magnetic fasteners with negligible activation signatures. Our Grade 2 and Grade 5 micro-hardware satisfies stringent outgassing thresholds under deep vacuum (< 10⁻⁹ mbar).
Dental Implantology & Prosthetics
Custom Abutment & Retaining Micro-Screws
Private dental clinics, maxillofacial dental laboratories, and prosthetic milling centers across the Granada metropolitan area require micro-threaded retaining screws with extreme fatigue life under repeated masticatory cyclic loading. We supply M1.4 and M1.6 abutment screws with customized thread pitches and DLC (Diamond-Like Carbon) coatings to reduce the friction coefficient, guaranteeing maximum pre-load retention and preventing screw loosening.
High-End Cycling: Sierra Nevada Pro Teams
Ultra-Lightweight Caliper & Cockpit Hardware
Sierra Nevada is world-renowned as the premier high-altitude training ground for UCI WorldTour cycling teams. Every gram saved translates to a tangible mechanical advantage on Andalusian ascents. Our factory supplies precision M4 and M5 flat-head Torx bolts and caliper mounting kits engineered from Ti-6Al-4V, reducing fastener mass by 44% compared to carbon steel while resisting the corrosive effects of saline road de-icers and continuous rain.
Cleanroom & Robotics Research
University of Granada (UGR) Engineering Labs
Researchers within the University of Granada’s Department of Structural Mechanics and Robotics laboratories frequently engineer micromechanical sensors, surgical end-effectors, and drone guidance payloads. We support rapid proto-runs and batch manufacturing for micro-sized hex-socket, pan-head, and counter-sunk fasteners conforming to ISO 14581, DIN 7991, and DIN 912 with zero minimum order friction.
Strategic Market Intelligence
Andalusian Advanced Manufacturing Trends (2025–2030)
How regional funding, European Union MDR regulations, and aerospace-medical convergences are shaping the procurement of titanium micro-fasteners in Granada.
Transition to EU MDR 2017/745
The implementation of Regulation (EU) 2017/745 requires European medical device manufacturers in Granada to exhibit complete material traceability down to the raw melt furnace lot. Legacy suppliers unable to provide EN 10204 Type 3.1 chemical analysis and tensile validation certificates are being rapidly phased out. Our supply chain delivers full chemical, mechanical, and bio-passivation documentation with each shipping dossier.
Shift to Additive-Subtractive Hybrid Assemblies
While 3D printing (Selective Laser Melting) of porous titanium implants is gaining traction across Granada medical labs, 3D printed threads under M3.0 exhibit unacceptable surface roughness (Ra > 3.2 µm) and poor fatigue retention. As a result, Andalusia’s bio-designers increasingly rely on hybrid manufacturing: 3D printing the complex porous scaffold, while securing it with precision Swiss CNC-turned micro-screws that possess mirror-finished, rolled threads.
Diversification of Andalusia’s Tech Supply Chains
Escalating raw material and electricity costs across Western European machine shops have prompted engineering directors in Andalusia to bypass intermediate distributors. By partnering directly with Baoji manufacturing hubs that house end-to-end vacuum arc remelting, forging, Swiss turning, and cleanroom packaging under one roof, Granada firms realize 30% to 50% cost efficiencies without sacrificing dimensional accuracy.
Procurement Intelligence
Frequently Asked Questions by Granada Buyers
Clear, technically sound guidance addressing Spanish import procedures, customs classification, testing standards, and order fulfillment logistics.
What documentation accompanies titanium micro-screw shipments to Granada? +
Every shipment arrives with a comprehensive quality verification packet. This includes the EN 10204 Type 3.1 Inspection Certificate validating the chemical composition (Al, V, Fe, C, N, H, O content) and mechanical properties (Tensile Rm, Yield Rp 0.2, Elongation A5) per ASTM B348, ASTM F136, or ISO 5832-3. We also provide dimensional First Article Inspection Reports (FAIR) executed on Keyence optical coordinate systems, ultrasonic cleaning certificates, and European CE declarations of conformity where applicable.
How are import customs duties and VAT handled when shipping to Andalusia, Spain? +
Shipments entering Spain are processed through the Agencia Tributaria (Spanish Tax Agency). Precision titanium screws fall under TARIC / HS Code 8108.90.90 (articles of titanium) or 7318 (fasteners). We provide complete commercial invoices, packing lists with net/gross weights, and dual-use classification declarations. For institutional and corporate clients in Granada, we offer DDP (Delivered Duty Paid) air freight via DHL, FedEx, or UPS, clearing Spanish customs seamlessly and delivering straight to your laboratory door without administrative burden.
What is the smallest screw diameter and tightest thread tolerance you machine? +
Our Swiss CNC turning centers regularly produce micro-screws down to M0.8 diameter with thread pitches as fine as 0.2 mm. We maintain dimensional tolerances of ±0.005 mm on critical shank diameters and class 4h/6h on metric threads per ISO 965. For custom medical implants, head runout and thread pitch concentricity are held within 0.008 mm TIR (Total Indicator Reading).
Can you manufacture non-standard micro-screws according to CAD drawings or samples? +
Yes. Custom component manufacturing accounts for over 65% of our daily production volume. Granada engineering teams can upload 2D drawings (DWG, DXF, PDF) or 3D models (STEP, IGES, SolidWorks). Our engineering team conducts a thorough DFM (Design for Manufacturability) review within 9 hours, confirming tool path access, drive recess depths (Torx, Hex, Tri-Wing, Phillips), chamfer transitions, and surface finish values (Ra 0.2 to 0.8 µm).
What surface finishes and biological anodizations are available for micro fasteners? +
We offer multi-stage chemical passivation (ASTM F86), electro-polishing for micro-burr removal, vacuum PVD coatings (TiN gold, DLC diamond-like carbon, AlTiN charcoal), and titanium anodizing. For medical devices, we perform Type II anodization (grey matte, increasing wear resistance and fatigue life) and Type III color anodization (gold, blue, green, purple) for surgical tray color-coding, utilizing electrolyte baths free from cytotoxic additives.
What is the typical lead time for deliveries to Granada, Spain? +
For standard stocked items (DIN/ISO fasteners in Gr5/Gr2), dispatch takes place within 48 to 72 hours. Custom CNC Swiss micro-turned batches generally require 10 to 18 business days for tooling setup, first-article optical verification, production, and passivation. Air courier delivery from our facility to Granada (GRX or AGP Malaga transit hubs) takes 4 to 6 business days via expedited global express.
China Titanium Valley Enterprise Advantage
Why Global Engineering Teams Partner with Vunza
Rooted in Baoji, China’s industrial titanium heartland since 2008, combining raw sponge refining proximity with advanced European-standard quality systems.
Sponge-to-Screw Complete Value Chain
Located immediately adjacent to the Baoti Group Industrial Park in Baoji, our facility sources triple-melted Vacuum Arc Remelted (VAR) ingots directly from certified metallurgical mills. By exercising complete quality control from the raw titanium sponge through to finished micro-threaded hardware, we eliminate third-party raw material fraud and deliver consistent grain size distributions (ASTM Grade 6 or finer).
34 Multi-Axis Swiss CNC Machine Fleet
Our workshop houses 34 precision 3-axis, 4-axis, and 5-axis CNC machining centers, alongside dedicated Swiss-type automatic turning centers equipped with sub-spindles and live tooling. This advanced infrastructure allows complete micro-part production in a single continuous setup, eliminating secondary handling errors and assuring concentricity tolerances down to 0.005 mm.
Veteran Technical Workforce & Fast Response
Over 50% of our CNC operators and quality engineers possess more than 13 years of dedicated hands-on experience in exotic refractory alloy processing. Operating with an average technical response time under 9 hours, our engineering staff interfaces directly with European project managers, evaluating complex 3D CAD files and proposing practical cost-reduction strategies.
Request an Engineering Review & Quotation for Granada
Whether you require standard DIN/ISO micro fasteners or custom-engineered titanium medical hardware built to proprietary drawings, our engineering team provides comprehensive DFM feedback and competitive factory pricing within 9 hours.
- 1 Submit 2D/3D CAD models (STEP, DWG, PDF) with target quantities
- 2 Receive comprehensive DFM analysis, tolerance checks, and price schedule
- 3 First-Article sample approval followed by batch delivery direct to Granada