DIN 7991
GR5 Titanium Bolts M8*20mm CNC Machined Countersunk Head Hex Socket Bolts
Drive: Hex Socket
Yield: ≥828 MPa
Send an Inquiry
Engineered Lightweight Fasteners Portfolio
Manufactured using aerospace-grade Ti-6Al-4V bar stock with rolled micro-threads, through-hole boring technology, and precision anti-galling surface finishes.
Heavy-Duty
GR5 Titanium Bolts M12*45mm Factory Price Cylindrical Head Hex Socket Bolts
Thread: M12 x 1.75
Finish: Natural Anodized
Send an Inquiry
Conical Head
GR5 Titanium Bolts M8 M10 M12 CNC Machined Tapered Head Inner Hex Bolts
Type: Tapered Stem
Weight: -43% vs Steel
Send an Inquiry
High Tensile
GR5 Titanium Bolts M10*40mm High Strength Cylindrical Head Hex Socket Bolts
Standard: DIN 912
Tensile: ≥950 MPa
Send an Inquiry
Hollow Core
GR5 Titanium Bolts M10*1*33mm Large Flat Head Hex Socket Hollow Bolts
Bore: Axial Through
Pitch: 1.0mm Fine
Send an Inquiry
Ultra Light
DIN912 M5 Titanium Socket Head Cap Screw Titanium Alloy Bolt
Use: Cycle / Medical
Density: 4.43 g/cm³
Send an Inquiry
PVD Gold
PSSTI GR5 Titanium Gold Flange Head Bolts Round Head Bolts M7*27
Flange: Integrated
Coating: TiN PVD
Send an Inquiry
ISO 7380
GR5 Titanium Bolts M6*60mm Button Head Hex Socket Bolts
Profile: Low Dome
Length: 60mm Full Run
Send an Inquiry
Structural Mechanics of Titanium Hollow Bolts in Mountain Environments
In high-stress mechanical assemblies, fasteners are traditionally designed as solid shafts. However, modern finite element analysis (FEA) proves that shear and torsional loads concentrate predominantly along the fastener's outer diameter (polar moment of inertia). By precision deep-hole gun-drilling an engineered inner lumen down the central neutral axis of a Grade 5 (Ti-6Al-4V) bolt, Navzo manufactures Titanium Hollow Bolts that shave an extra 15% to 22% weight beyond standard titanium bolts—translating to a staggering 55% weight reduction when compared against traditional Grade 10.9 and 12.9 carbon steel screws.
Key Metallurgical Insight: Ti-6Al-4V combines an alpha-beta crystal structure yielding high shear strength while retaining fatigue ductility. In hollow fasteners, the quality of the internal through-bore is paramount: Navzo uses dedicated internal micro-finishing tools that remove longitudinal reaming chatter, mitigating internal surface micro-notches where micro-fractures often originate under high-frequency mountain vibrations.
Unlike standard generic subtractive machining where thread valleys are turned on a lathe, cutting across the grain boundary, Navzo utilizes cold heading coupled with high-speed precision thread rolling. Thread rolling preserves the contiguous crystalline flow of the Baoji-refined titanium along the root radius, increasing thread pull-out thresholds and providing fatigue limits exceeding 200,000 cycles under cyclical tensile pre-loads.
Localized Engineering Applications in Sant Julià de Lòria
Sitting in the southern gateway parish of Andorra, Sant Julià de Lòria is characterized by dramatic elevation changes, aggressive mountain roads, high humidity fluctuations, and harsh winter road-salt cycles.
Elite Mountain & Road Cycling
Sant Julià de Lòria serves as the climbing launchpad for the legendary Coll de la Gallina. Custom bike tuning workshops and pro-tour athletes demand hollow stem bolts, disc rotor screws, and derailleur pivots to shave essential rotational and static grams while resisting sweat and alpine storm corrosion.
Enduro & Off-Road Motorcycle Builds
Navigating the jagged trails of Naturland and the Pyrenean backcountry subjects suspensions and triple clamps to brutal shock loads. GR5 hollow bolts reduce unsprung mass at brake calipers and suspension links without sacrificing shear integrity.
Ski Infrastructure & Technical Equipment
Equipment deployed across sub-zero altitudes faces severe chloride and chemical de-icing attack. Titanium fasteners naturally regenerate a resilient titanium oxide (TiO2) passive layer, completely eliminating the brittle rust that destroys carbon and low-alloy steels.
Comparative Metallurgical Specifications
Evaluating mechanical strength, mass, and electrochemical inertness for cross-border engineering teams.
| Alloy Specification | Density (g/cm³) | Tensile Strength (MPa) | Yield Strength (MPa) | Resistance to Salt Spray | Alpine Thermal Stability |
|---|---|---|---|---|---|
| Navzo GR5 Titanium (Ti-6Al-4V) | 4.43 | 895 – 1000 | ≥ 828 | Immune (No Pitting) | Stable down to -60°C |
| Alloy Steel Grade 10.9 | 7.85 | 1040 | 940 | Rapid Degradation without Plating | Prone to Low-Temp Embrittlement |
| Stainless Steel (A2-70 / 304) | 7.93 | 700 | 450 | Moderate (Crevice Attack Risk) | Good Ductility |
| Aluminum 7075-T6 | 2.81 | 572 | 503 | Prone to Galvanic Corrosion | High Thermal Contraction |
Procurement Trends in Sant Julià de Lòria & The Andorran Corridor
Andorra's unique status outside the EU customs territory paired with its strategic transit connection through Sant Julià de Lòria to La Seu d’Urgell (Spain) has catalyzed a thriving market for ultra-high-end mechanical workshops, racing telemetry teams, and specialized alpine machinery distributors. We observe three distinct procurement trends across the region:
1. Shift Toward Total Lifecycle Anti-Corrosion: Standard zinc-plated or black-oxide steel fasteners require annual replacement due to winter road salting along the CG-1 artery. Independent engineering centers in Sant Julià de Lòria are progressively adopting Grade 5 titanium as a permanent, zero-maintenance assembly standard.
2. Unsprung Mass Optimization for Electric Mobility: As electric mountain bikes (e-MTBs) and high-torque electric trial bikes gain prominence across the parish's rugged hills, workshops utilize hollow titanium studs and flange bolts to compensate for substantial battery pack weight without diminishing chassis stiffness.
3. Demand for Turnkey Factory Direct OEM Customization: Local tuning brands are eschewing generic middlemen distributors in southern Europe in favor of factory-direct partnerships with verified Baoji manufacturers capable of delivering custom laser-engraved branding, specific head geometries, and custom PVD colors (Burnt Blue, Gold, Rainbow, and Deep DLC Black).
Enterprise Strengths & Factory Infrastructure
Direct supply advantages from Yucai Road, High-tech Development Zone, Baoji, Shaanxi, China.
Baoji Titanium Valley Origin
Founded on January 10, 2011, Navzo is located at the heart of China’s largest titanium hub, securing first-tier access to high-purity vacuum arc remelted (VAR) titanium sponge and certified bar stock.
Integrated Production Architecture
Our complete manufacturing footprint encompasses multi-station cold/hot heading, 5-axis CNC machining centers, precision hollow gun-drilling, and high-speed thread rolling units under an ISO-controlled umbrella.
Certified Material Traceability
Every shipment comes accompanied by authentic Mill Test Reports (MTRs) according to EN 10204 3.1 standards, certifying exact chemical composition (Fe, O, C, N, H, Al, V) and rigorous mechanical properties.
In-House Surface Finishing
We operate proprietary electrochemical anodization, precision thermal oxidation (burnt blue), and vacuum Physical Vapor Deposition (PVD) chambers for high-wear resistance and vivid aesthetic finishes.
Direct Global Logistics Experience
Exporting across Europe and the Americas with specialized experience in DDP and international express shipping to the Principality of Andorra, handling customs declaration dossiers seamlessly.
1-Hour Technical Engineering RFQ
Our multilingual sales engineering desk provides initial drawing reviews, manufacturability assessments (DFM), and cost estimations within one hour during business days.
Frequently Asked Questions by Local Buyers
Detailed technical answers addressing procurement, logistics, installation, and performance.
Does hollow drilling compromise the tensile strength of the titanium bolt?
When engineered correctly, the reduction in ultimate yield load is nominal compared to the substantial weight savings. Shear and bending stresses peak near the bolt’s periphery. By sizing the internal bore diameter to not exceed 30–35% of the minor thread diameter, the structural load capacity remains well within safety thresholds for motorcycle calipers, bicycle stems, and suspension linkages.
How are import deliveries handled for Sant Julià de Lòria, Andorra?
Shipments are routed efficiently via international air express (DHL/FedEx/UPS) directly into Andorra or through customs clearance hubs in Barcelona/Toulouse. We prepare all commercial documentation, origin declarations, and dual-use classification declarations to ensure zero border clearance delays.
Why is anti-seize paste essential when installing titanium bolts?
Titanium has a natural chemical affinity that can cause galling (cold-welding) when driven against other metals—especially when mated with aluminum or stainless components under high torque. We recommend a copper-based, nickel-based, or synthetic PTFE anti-seize paste to ensure smooth torque tensioning and prevent galvanic interaction.
What is the difference between PVD coating and standard electrochemical anodizing?
Anodizing is an electrochemical process that varies the thickness of the natural titanium oxide layer to refract color (Gold, Blue, Purple). PVD (Physical Vapor Deposition) applies a micro-thin ceramic layer (like Titanium Nitride) in a vacuum chamber, creating extreme surface hardness (HV > 2000), offering superior resistance against rock debris and tool slippage.
Can Navzo customize hollow bolts based on our proprietary CAD files?
Yes. We routinely manufacture OEM and ODM hardware according to customer STEP, DWG, or PDF specifications. Our engineers review tolerance parameters, bore depths, tool relief angles, and thread lead-ins, delivering rapid physical prototypes prior to mass batches.
What is your minimum order quantity (MOQ) for hollow and custom bolts?
For standard catalog items, MOQ typically starts at 100 to 200 pieces. For bespoke CNC-machined hollow bolts or unique thread pitches (such as fine M10x1.0 or M12x1.25), prototype evaluation runs of 50 pieces are available for engineering qualification.
Accelerate Your Mechanical Performance Today
Whether you require standard DIN912 lightweight bolts or bespoke custom hollow fasteners engineered for alpine rigor in Sant Julià de Lòria, our engineering team in Baoji is ready to assist.
Send an Inquiry