GR5 Titanium Bolts M8*20mm Countersunk Head Flat Phillips Screws
- Thread Size
- M8 × 1.25 × 20mm
- Geometry
- 90° Flush Countersunk
- Material
- Ti-6Al-4V (Grade 5)
- Tolerance
- Class 6g Thread fit
Catalog Overview
High-Torque 12-Point & Precision Titanium Fasteners
Manufactured from authentic Ti-6Al-4V Grade 5 titanium bar stock in Baoji's industrial heartland. Engineered with rolled threads, defect-free root radiuses, and precision wrenching drives for critical assemblies.
GR5 Titanium Exhaust Manifold Stud Manifold Bolt Polished Finish M8*1.25*45
- Thread Spec
- M8 × 1.25 × 45mm
- Thermal Limit
- 400°C Continuous
- Finish
- Vibratory Mirror Polish
- Application
- Exhaust / Turbo System
GR5 Titanium Lock Anti-Loosening Nut M6 M8 M10 PVD Finished
- Diameters
- M6 / M8 / M10 Pitch
- Coating
- Vacuum PVD Ion Coat
- Mechanism
- Prevailing-Torque Lock
- Safety
- Resists Dynamic Vibro-slip
GR5 Titanium Tapered Cone Head Hex Socket CNC Bolts M8 M10 M12
- Drive Interface
- Internal Hex Socket
- Geometry
- Weight-Relieved Taper
- Yield Point
- 828 MPa Min
- Thread Range
- M8 / M10 / M12
DIN912 M5 Titanium Socket Head Cap Screw Alloy Bolt for High-End Assembly
- Standard
- DIN 912 / ISO 4762
- Thread Spec
- M5 Standard Coarse
- Density
- 4.43 g/cm³
- Industries
- Aviation / Medical / Auto
GR5 Titanium Nuts M12*1.5 High Strength Hex Flange Full Thread Nuts
- Pitch
- M12 × 1.5 Fine Pitch
- Flange Face
- Integrated Integral Washer
- Tensile Class
- Class 10.9 Equivalent
- Application
- Suspension / Subframe
PSSTI GR5 Titanium Gold Flange Head Round Head Bolts M7*27
- Dimensions
- M7 × 1.0 × 27mm
- Surface
- Hard Anodized Gold
- Load Profile
- Wide Area Flange Clamp
- Corrosion
- Salt Spray ASTM B117 >500h
GR5 Titanium Bolts M8*25mm High Strength Cylindrical Cup Head Allen Screws
- Dimensions
- M8 × 1.25 × 25mm
- Process
- Hot-Forged Head + Rolled Thrd
- Tensile
- 950 MPa Tested Yield
- Certification
- 3.1 Mill Certificate
Mechanical Metallurgy & Mechanics
The Engineering Case for 12-Point Titanium (Ti-6Al-4V) Fasteners
A rigorous examination of clamp load generation, high torque transmission, and weight minimization in harsh service conditions.
Bi-Hexagonal (12-Point) Drive Kinematics
The 12-point (double-hex) head profile is engineered specifically to overcome the torque-transmission bottlenecks inherent in standard 6-point hex and internal Allen sockets. By doubling the wrench engagement contact points from six to twelve, the drive increases flank engagement surface area while reducing the angular indexing travel required to seat a socket from 60° down to 30°. This geometry allows mechanical engineers to specify substantially higher pre-load torque values without risking head corner stripping, stress crack initiation, or socket slippage.
High Clamping Torque
Low Angular Indexing (30°)
Reduced Wrench Envelope
Alpha-Beta Phase Microstructure Stability
Navzo fasteners utilize certified alpha-beta dual-phase Ti-6Al-4V (Grade 5, UNS R56400, Werkstoff 3.7165). Sourced directly from premier Baoji sponge reduction mills, our bars exhibit exceptionally homogeneous grain structures. Aluminum stabilizes the alpha phase to maintain elevated mechanical integrity up to 400°C, while vanadium stabilizes ductile beta grains, allowing our bolts to absorb cyclical shear vibration, prevent rapid fatigue failure, and achieve an extraordinary strength-to-density ratio exceeding all standard 8.8 and 10.9 steel fasteners.
Alpha-Beta (Ti-6Al-4V)
ASTM B348 / AMS 4928
Density: 4.43 g/cm³
| Alloy / Specification | Yield Strength (Rp 0.2, MPa) | Tensile Strength (Rm, MPa) | Density (g/cm³) | Modulus of Elasticity (GPa) | Fatigue Endurance Limit (10⁷ Cycles) | Electrochemical Passivation |
|---|---|---|---|---|---|---|
| Navzo GR5 Titanium (Ti-6Al-4V) 12pt | ≥ 828 | 895 – 1050 | 4.43 | 114 | 510 MPa | Self-healing TiO₂ Passive Film (Inert) |
| Structural Steel Grade 10.9 | 900 | 1000 – 1200 | 7.85 | 210 | 420 MPa | Low (Vulnerable to Rust & Pitting) |
| Austenitic Stainless Steel (A2-70 / 304) | 450 | 700 | 7.90 | 193 | 280 MPa | Moderate (Pitting in Chloride Media) |
| Marine Stainless Steel (A4-80 / 316) | 600 | 800 | 8.00 | 193 | 310 MPa | Good (Susceptible to Crevice Attack) |
| Commercial Pure Titanium (Grade 2) | 275 | 345 | 4.51 | 103 | 220 MPa | Superior (Limited by Low Yield Load) |
Regional Industrial Matrix
Wrocław & Lower Silesia Application Scenarios
Positioned along the Odra River and connected via the A4 industrial corridor, the Wrocław metropolitan area and the wider Lower Silesian Voivodeship represent Central Europe's prime technology, aerospace, and electromobility manufacturing hub.
Aviation Valley & Engine Subsystems
Lower Silesian aerospace facilities (part of the extended Aviation Valley corridor connecting Wrocław, Świebodzice, and Dzierżoniów) require ultralight 12pt flange bolts for auxiliary power units (APUs), jet nacelle cowlings, and hydraulic actuation clamps where weight reduction directly scales aircraft fuel efficiency.
EV Battery Packs & Inverter Casings
With massive e-mobility clusters centered around Biskupice Podgórne and Kobierzyce southwest of Wrocław, battery enclosure designers implement titanium 12pt flange screws for non-magnetic properties, galvanic corrosion resistance, and high structural clamping under harsh harmonic roadway vibrations.
Automated Assembly End-Effectors
Robotics integrators throughout the Wrocław Technology Park (WPT) deploy titanium 12pt bolts on high-speed pick-and-place end-of-arm tooling (EOAT). The 44% mass reduction drastically decreases rotational inertia, enabling shorter cycle times and extending servo-motor operational lifespans.
Prototyping & Motorsport Engineering
Polish tuning ateliers, hillclimb racing constructors, and track engineering teams in Lower Silesia substitute heavy steel wheel hubs, caliper mounting points, and turbocharger manifolds with Navzo 12-point flange fasteners to shave unsprung mass and withstand extreme brake heat soak.
Specialty Chemical & Pharmaceutical Pumps
Wrocław's biotechnology and pharmaceutical manufacturing equipment employs titanium hardware to completely eradicate crevice oxidation in autoclave, chlorination, and organic solvent washdowns where 316L stainless steel suffers localized pitting failure.
Turbomachinery & Cryogenic Valves
Energy systems across southwestern Poland integrate 12pt titanium studs and nuts across steam distribution governors and LNG cryogenic manifolds, maintaining elastic elongation without cold-embrittlement down to -196°C.
Procurement Strategy 2025–2030
Regional Sourcing Trends in Lower Silesian Manufacturing
A strategic breakdown of procurement challenges, European compliance realities, and risk-mitigated supply models for Polish purchasing managers.
Supply Chain Decoupling from High-Risk Zones
Historically, European machine builders relied on Eastern European or Russian titanium suppliers. Geopolitical disruptions and sanctions have forced Wrocław procurement departments to diversify toward reliable, fully auditable Baoji supply chains featuring complete batch-level traceability from vacuum arc remelting (VAR) to CNC packing.
Mandatory Material Certifications (EN 10204 3.1)
Polish quality assurance directors increasingly reject non-certified hardware. Navzo guarantees complete mill test reports (MTRs) detailing precise chemical percentages (Al, V, Fe, C, N, H, O) and physical inspection values (tensile, yield, elongation) compliant with DIN, ISO, and ASTM requirements for aerospace validation.
Direct Factory OEM/ODM Sourcing vs Distributors
Middlemen across Central Europe typically inflate titanium fastener costs by 150–300%. Sourcing direct from Navzo's Baoji factory floor delivers tier-1 OEM cost structures, custom length adjustments, customized shank unthreaded steps, and custom head markings without distributor markups.
Optimized Logistics via Wrocław-Copernicus Airport & Rail Freights
For urgent development prototypes, Navzo coordinates priority air transit landing at Wrocław-Copernicus Airport (WRO) within 4–6 business days via DHL/FedEx Express. For high-volume scheduled production lines, cost-optimized intermodal rail corridors (New Silk Road connecting Xi'an directly to Małaszewicze and Wrocław) significantly cut freight expenditures while maintaining dependable delivery cadences.
Baoji Direct Manufacturer
Why Polish Engineers Rely on Navzo Titanium
Founded on January 10, 2011 on Yucai Road in Baoji's High-Tech Development Zone, Navzo Precision Titanium Products Co., Ltd. is positioned at the ground floor of China's Titanium Valley, controlling the full lifecycle from raw ingot to finished fastener.
- Cold & Hot Heading Machinery: Grain-flow continuous forging that eliminates internal shear stress cracks at the bolt-to-flange transition.
- Thread Rolling Technology: Cold-rolled thread crests and radiused roots providing +30% greater fatigue cycle life compared to cut threads.
- Advanced CNC Machining Center: Multi-axis turning and milling capable of maintaining ±0.005mm tolerances on complex 12-point and custom drawings.
- Surface Treatment Finishing: High-vacuum PVD sputtering, electrochemical anodizing (gold, burnt blue, purple, black), and vibratory polishing.
- 100% Pre-Shipment Optical & Gauge Inspection: Optical sorting, thread ring gauge verification, and tensile proof load testing on every lot.
Get Catalog
⚡ Rapid Engineering Quotations Within 1 Hour
Assembly Protocols
Anti-Galling & Torque Preload Best Practices
Titanium fasteners behave differently than alloy steel under frictional rotation. Adhere to these mechanical rules to safeguard thread integrity during installation.
The Mechanism of Thread Galling (Cold Welding)
Titanium possesses an instantaneous, dense passivating titanium oxide (TiO₂) surface layer. However, under concentrated contact friction and heavy torque preload, this micro-film can break down, causing direct metal-to-metal shear contact. Without lubrication, atomic adhesion causes thread seizing or galling. When installing GR5 12pt titanium bolts into titanium or stainless tapped holes, never assemble threads dry.
Recommended Anti-Seize Compounds
For industrial applications across Wrocław workshops, apply an engineered synthetic anti-seize paste containing MoS₂ (Molybdenum Disulfide), PTFE, or colloidal copper/nickel suspensions. When mating titanium bolts to aluminum housings or carbon fiber structures, use an electrically isolating non-metallic paste (such as ceramic-based anti-seize) to eliminate any potential micro-galvanic galvanic potentials.
Procurement & Engineering FAQ
Frequently Asked Questions by Polish Technical Buyers
Specific answers covering specifications, customs clearance in Poland, minimum orders, and certification compliance.
How do 12-point titanium flange bolts compare to DIN 912 Allen bolts?
While DIN 912 socket head screws are ubiquitous, their internal hex drive limits the maximum torque you can apply before the Allen key rounds out inside the socket. A 12-point (bi-hex) flange design moves the drive surface to the external circumference, doubling wrench contact flanks and allowing 20% to 35% higher clamping torque pre-loads. Furthermore, the integrated flange spreads the clamping load over a wider surface area, completely eliminating the need for separate flat washers in tight machine cavities.
Can Navzo supply EN 10204 Type 3.1 inspection certificates for audits in Poland?
Yes. Every production batch is dispatched with complete EN 10204 3.1 inspection documentation. This includes heat-lot chemical breakdown (verifying Titanium, Aluminum, Vanadium, Oxygen, Carbon, Nitrogen, and Hydrogen thresholds), physical tensile testing, elongation data, Rockwell hardness (HRC), and dimensional verification records ready for ISO 9001 and AS9100 quality audits.
What are the customs, import duties, and VAT procedures when importing to Wrocław?
Titanium bolts exported from China to Poland (EU) typically fall under TARIC / HS Code 8108.90.90 or 7318.15 depending on classification. Polish buyers with a valid EU EORI and VAT number pay standard Polish VAT (23%), which is reclaimable through regular tax accounting. Navzo handles all commercial export declarations, proforma documentation, packaging lists, and certificates of origin to guarantee smooth clearance through Polish customs at Warsaw, Wrocław, or Gdańsk.
What is your Minimum Order Quantity (MOQ) for custom 12pt dimensions?
For standard catalog items in common metric diameters (M5, M6, M8, M10, M12), our MOQ starts at only 100 to 200 pieces per size. For custom CNC titanium parts, specialized shank diameters, or unique thread pitches manufactured from customer STEP or DWG files, pilot test runs can be initiated with 20–50 pieces before committing to volume mass manufacturing.
What surface treatment is best suited for Polish winter road salt and humidity?
Natural polished Ti-6Al-4V is already impervious to de-icing salt (sodium chloride and calcium chloride) because titanium does not pit or rust like steel. For decorative or color-coded identification, Physical Vapor Deposition (PVD) coating (yielding DLC black, titanium nitride gold, or rainbow neo-chrome) is significantly harder (up to 2000–2500 HV) and offers superior abrasion protection against road grit compared to thin decorative anodizing.
What is the typical shipping lead time from Baoji to Wrocław?
In-stock fastener dimensions ship within 24 to 48 hours. Express air courier transit via FedEx, DHL, or UPS takes approximately 4 to 6 business days directly to your facility in Wrocław or Lower Silesia. Custom OEM CNC production runs generally require 15 to 25 manufacturing days, with express air delivery available immediately upon quality clearance.
Upgrade Your Fastener Architecture Today
Direct factory engineering consultation, immediate 1-hour quotations, and mill-certified Ti-6Al-4V Grade 5 hardware tailored for Wrocław's aerospace, e-mobility, and high-precision machine sectors.
Get Catalog
Direct Inquiries: [email protected]