Gr5 Titanium
DIN912 M6 Burnt Blue Socket Head Cap Screw
- Standard: DIN 912 / ISO 4762
- Material: Gr5 Ti-6Al-4V Alloy
- Finish: PVD Burnt Blue Anodized
Factory Direct Supply
Engineered Titanium Fasteners & Components Portfolio
Directly machined from ASTM B348 certified Grade 5 (Ti-6Al-4V) titanium bar stock in China's Titanium Valley (Baoji). Precision threads, CNC-lathed tolerances (±0.01mm), and surface anodization suited for high-torque bicycle chainrings, disc assemblies, and motorsport powertrains.
Custom Finish
Titanium Large Cap Head Hex Fairing & Crank Bolts
- Head Profile: Low-Profile Large Flange
- Material: Gr5 Hardened Titanium
- Feature: Aerodynamic / Anti-Galling
Industrial / Bike
Wholesale GR5 DIN912 Custom Titanium Hex Fasteners
- Dimensions: M3–M16 (Custom Lengths)
- Tensile Strength: ≥ 895–1000 MPa
- Tolerance: DIN 13 / ISO 965 6g
Rotor / Drive
Hexagonal Step Flat Head Titanium Rotor & Spider Bolts
- Thread Pitch: M8 × 1.25mm Teeth
- Profile: Precision Stepped Shoulder
- Weight Saving: 44% vs Heat-Treated Steel
ISO 9001
ZFTI High Strength GR5 Plain Finish Flange Bolt M4-M10
- Specification: DIN 6921 Integrated Flange
- Processing: Full CNC Multi-Axis Milling
- Finish: Ultra-Smooth Ra ≤ 0.8 μm
Full Thread
ZFTI Factory Direct ISO 4018 Full Thread Hex Bolt
- Sizing Range: M8, M10, M12, M14, M16
- Standard: ISO 4018 / DIN 933 Metric
- Yield Strength: ≥ 828 MPa Class 8.8+
Dynamic Load
Titanium M8 20mm/25mm Brake Rotor & Sprocket Screw
- Drive Type: Torx T40 / Hex Internal
- Thread Type: Rolled Thread Anti-Fatigue
- Corrosion Rate: Zero in Chloride / Salts
Precision Cycling
Titanium M5 Stem & Chainring Fastener with Washer
- Dimensions: M5 × 16mm / M5 × 18mm
- Assembly: Integrated Floating Washer
- Torque Rating: Recommended 5.5–6.2 N·m
Localization & Technical Deep-Dive
Application Scenarios in Pljevlja: Drivetrain Dynamics in Sub-Alpine & Industrial Environments
Pljevlja stands as Montenegro's industrial and mineral hub, situated within a high-elevation sub-alpine basin bordered by Mount Ljubišnja and the Tara River Canyon. The deployment of mechanical hardware—ranging from performance endurance cycling and e-mountain bike (e-MTB) single-chainring cranksets (1x drivetrain conversions) to industrial conveyor-drive sprocket bolts—confronts extreme structural and atmospheric stressors.
Severe Shear & Torque Transmission
Pljevlja's steep topography requires consistent high-torque pedaling (>450W instantaneous peak power on 12-speed wide-ratio cassettes). Standard steel bolts add rotational inertia, while aluminum 7075-T6 chainring bolts frequently suffer head stripping and shear failure under dynamic climbing loads. Grade 5 Ti-6Al-4V delivers an optimal yield strength of 828 MPa, preventing crank spider elongation.
Sulfur Emissions & Winter De-icing Salts
Home to the Pljevlja Thermal Power Plant and extensive lignite operations, the urban and suburban microclimate exhibits elevated sulfur dioxide (SO2) and particulates, accompanied by aggressive chloride de-icing salts on alpine passes during sub-zero Balkan winters. Our titanium chainring fasteners form an impenetrable, self-healing TiO2 oxide passivation film that eliminates pitting and galvanic seized threads.
Fatigue Resistance Under Low Temperatures
Winter conditions in northern Montenegro regularly plunge below -15°C. Conventional carbon steels undergo ductile-to-brittle transitions under repetitive shock loading from rugged trail obstacles, rock strikes, and heavy cadence spikes. Gr5 titanium exhibits exceptional cryogenic tenacity and low thermal expansion (8.6 × 10-6/K), ensuring constant clamping preload on carbon and alloy cranks.
| Mechanical / Chemical Parameter | Yevzo Gr5 Titanium (Ti-6Al-4V) | Aircraft Aluminum (AL7075-T6) | Stainless Steel (A2-70 / AISI 304) | Chrome Moly (Grade 8.8) |
|---|---|---|---|---|
| Ultimate Tensile Strength (UTS) | 895 – 1000 MPa | 540 – 570 MPa | 700 MPa | 800 MPa |
| Tensile Yield Strength (Rp0.2) | ≥ 828 MPa | 480 MPa | 450 MPa | 640 MPa |
| Density (ρ) / Structural Weight | 4.43 g/cm³ (~44% lighter than steel) | 2.81 g/cm³ | 7.90 g/cm³ | 7.85 g/cm³ |
| Shear Modulus / Hex Socket Integrity | Extreme (Cold rolled, zero stripping) | Low (Hex corners round off easily) | Moderate | High (Prone to oxidation) |
| Pljevlja Industrial Atmosphere Resistance | Immune (SO2, Acid Rain, CaCl2 Salts) | Prone to stress cracking & white rust | Crevice corrosion in salty slushes | Requires plating; inevitable rust |
| Thread Galling Mitigation | Optimized via PVD/Anodized Films + Anti-Seize | Frequent thread binding under torque | High galling propensity | Moderate |
Economic & Industry Trajectory
Balkan Drivetrain Trends: The Transition to High-Performance Hardware in Pljevlja
As Montenegro advances its accession toward the European Union, rigorous decarbonization programs and the national "Just Transition" strategy are pivoting Pljevlja from an exclusive heavy coal economy toward eco-tourism, mountain sports infrastructure, outdoor recreation, and specialized mechanical servicing across the northern highlands.
Surging E-MTB High-Torque Motor Conversions
Electric mountain bikes equipped with mid-drive motors (Bosch CX, Shimano EP8, Brose) delivering 85–95 N·m of torque put massive stress on front 1x chainring spiders. Importers, workshop networks, and cycle hire operators throughout Pljevlja and Žabljak are actively retrofitting fleets with forged Ti-6Al-4V chainring nuts and bolts to prevent premature chainring loosening and drivetrain dropouts.
Enduro & Gravel Bikepacking Expansion
The rugged trails across the Ljubišnja mountain massif and Tara canyon routes have fostered an active community of gravel riders and backcountry racers. Competitive riders demand ultra-lightweight, high-fatigue titanium chainring hardware with captive Torx (T30) fittings that allow safe trailside repairs without the rounding risks common to soft alloy hardware.
B2B Wholesale & Supply Chain Directness
Historically reliant on multi-tiered European distributors in Germany or Italy that add heavy markups, Montenegro repair facilities and mechanical hardware distributors in Pljevlja are adopting factory-direct sourcing models. Sourcing directly from our Baoji manufacturing complex slashes cost per unit by 35–50% while guaranteeing direct mill cert compliance.
Factory Verifiable Strengths
Why Pljevlja Importers & B2B Distributors Partner with Yevzo
Rooted in Baoji, Shaanxi—internationally recognized as China's Titanium Valley—Yevzo Titanium Metal Co., Ltd. has delivered precision titanium processing, OEM fabrication, and global hardware export services since 2013.
Full In-House Industrial Manufacturing
We eliminate trading middlemen. Operating over 100 multi-axis CNC machining, thread rolling, and cold heading centers in Baoji, we oversee every fabrication step from ASTM B348 Grade 5 round titanium billet preparation to CNC lathe cutting, automated cleaning, and multi-color vacuum PVD surface anodization.
Rigorous Lot Traceability & EN 10204 3.1
Every shipment bound for Montenegro includes chemical composition and mechanical tensile test reports. Our laboratory uses optical emission spectrometry (OES) to guarantee Ti balance, <0.20% O, <0.08% C, 5.5–6.75% Al, and 3.5–4.5% V, strictly matching aerospace ASTM F136 and ASTM B348 parameters.
Flexible B2B Terms & Expedited Logistics
We support Pljevlja retailers and industrial clients with agile ordering: standard sizes from just 10–30 pcs, custom drawing prototypes (STEP / DWG) within 7–10 days, and fast express door-to-door delivery via DHL/FedEx/UPS (DDP terms available) to ensure uninterrupted assembly lines.
Procurement Inquiries
Frequently Asked Questions for Sourcing in Pljevlja, Montenegro
Direct technical answers addressing customs clearance, torque specifications, thread compatibility, and assembly guidelines for procurement teams in northern Montenegro.
What are the exact dimensional standards for single vs. double chainring bolts?
Single chainring bolts (popular for modern 1x gravel, MTB, and e-MTB setups) typically utilize an M8 × 0.75mm fine thread pitch with a male bolt length of 4.5mm to 6.5mm and a nut sleeve depth of 4.0mm to 5.0mm. Double chainrings (traditional 2x road or touring cranksets) require longer 8.5mm to 10.5mm sleeves to clamp both chainrings safely against the crank tabs. Yevzo manufactures both standard profiles and bespoke lengths, engineered to seat seamlessly into Shimano, SRAM, RaceFace, and custom CNC chainrings.
How can we prevent thread galling when installing titanium bolts into aluminum crank spiders in Pljevlja?
Titanium threads have a natural tendency to cold weld (gall) when torqued directly into contact with bare aluminum or other titanium components without lubrication. For installations in Pljevlja's damp, salt-exposed environment, always apply a high-grade titanium anti-seize paste (containing copper, aluminum, or nickel flakes) or synthetic fluoropolymer grease to both male and female threads, as well as under the bolt flange. Tighten using a calibrated torque wrench to 8–10 N·m for M8 titanium chainring bolts (versus 12–14 N·m for steel), which provides adequate preload without stretching the crank spider tabs.
What customs, duty, and freight procedures apply when importing from Baoji to Montenegro?
Shipments entering Montenegro are cleared through the Customs Administration of Montenegro (Uprava carina Crne Gore) under the Harmonized System (HS) Code 8108.90 (Articles of Titanium / Titanium Fasteners). We supply full international documentation, including Commercial Invoice, Packing List, Certificate of Origin, and Mill Test Certificates (EN 10204 3.1). We support Incoterms including EXW, FOB, CFR, CIF, and full door-to-door express courier (DDP/DAP via DHL/FedEx) direct to your facility in Pljevlja, handling customs documentation for straightforward clearance.
Why choose Torx (T30) over standard internal Hex (Allen) sockets for chainring bolts?
Standard internal hex sockets have only 6 shallow contact points, which can easily strip out when torqued with a slightly misaligned hex key during muddy trailside repairs. Our precision CNC-broached Torx T30 drive interfaces feature 6 lobes with a 15-degree drive angle, delivering much higher torque transfer efficiency, virtually eliminating tool slippage (cam-out), and preserving the head integrity across hundreds of chainring swaps.
Does anodizing or PVD burnt-blue finish alter thread dimensional tolerances?
No. Our proprietary electrolytic anodization produces an ultra-thin controlled microscopic titanium oxide layer (nanometers thick) that creates vivid colors (gold, purple, cyan, burnt blue, rainbow) solely through optical light interference. It adds negligible measurable thickness to the thread pitch diameter. Our threads maintain a 6g pitch tolerance after finishing, guaranteeing smooth, rattle-free engagement with all chainring nuts.
What is your Minimum Order Quantity (MOQ) and sample evaluation policy?
For stock configurations (DIN 912, ISO 4018, and standard M8 chainring fasteners in raw polished, gold, or burnt blue finishes), our MOQ is just 20 to 50 pieces per size, making it easy for independent workshops, bike builders, and B2B distributors in Montenegro to evaluate our quality. Custom OEM drawing-based orders usually require a modest 100-piece batch, with pre-production samples shipped to Pljevlja via air express within 7 business days.
Request a Factory Quote or Custom CAD Proposal
Whether you require standard bulk packs of Gr5 titanium chainring bolts or customized high-load fasteners for Montenegro's specialized distribution networks, our engineering team in Baoji delivers fast pricing, drawing reviews, and complete material certification.
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