Certified
ZFTI High Strength GR5 Plain Finish Titanium Flange Bolt M4-M10 CNC Precision Manufactured ISO 9001 Certified
- Grade: Grade 5 (Ti-6Al-4V)
- Tensile: ≥ 895 MPa
- Thread Range: M4 – M10 Precision
Featured Aerospace & Industrial Titanium Hardware
Precision-engineered in Baoji Titanium Valley. Fully certified to ISO 9001 and ASTM standards, providing optimal shear resistance, zero atmospheric galling, and flush-mount dynamic balancing for demanding industrial lines.
Anodized
Anodized High Strength GR5 Titanium Alloy M6*15 Umbrella Head Bolts for Motorcycle Modification
- Head Form: Umbrella / Low Flat
- Standard: Custom Tuning / OEM
- Coating: Electrolytic Anodized
Automotive
Titanium Alloy Gr5 M12 M14-1.5x30 Hex Lug Bolts Plain Finish Class 8.8 High Strength
- Seat Type: Conical / Ball Radius
- Size: M12 / M14 × 1.5
- Strength: Surpasses Steel 8.8
Precision
Titanium Bolts Motorcycle Brake Disc Bolt M6 X 20mm for Brake Disc Bolt Screw
- Application: Brake Disc / Rotor Assembly
- Yield Strength: ≥ 828 MPa
- Surface: Micro-Vibrated Polish
Standard
ZFTI Factory Direct Titanium Hex Bolt Full Thread ISO 4018 M8 M10 M12 M14 M16 CNC Machined Plain Finish High Quality
- Standard: ISO 4018 Full Thread
- Nominal: M8 through M16
- Tolerance: DIN ISO 965-1 (6g)
Industrial
M5 M6 M8 Wholesale Titanium Alloy Hexagon Head Industrial Grade Bright Finish Bolts for Bike Shop Stem Screws Supply
- Finish: Electro-Bright Cleaned
- Diameters: M5, M6, M8 Metric
- Integrity: Rolled Thread Grain Flow
PVD Coated
Gr5 Ti 6Al 4V Available Immediately Hot Selling Titanium Alloy Flange Bolts for Motorcycles PVD Anodized M6 M8 M22
- Processing: PVD Vacuum Multi-Color
- Inventory: Direct Stock Baoji Mill
- Pitch: Precision Pitch Available
Countersunk/Disc
Motorcycle Titanium Bolts Hexagonal Step Flat Head Zinc Finish M8 1.25 Teeth Disc Brake
- Head Form: Stepped Flat Countersunk
- Profile: M8 × 1.25 Coarse
- Torque Limit: Class 10.9 Equivalent
1. Technical Whitepaper: Titanium Countersunk Fasteners in Precision Engineering
In mechanical assemblies where aerodynamic drag, laminar airflows, and zero surface obstruction are strict functional requirements, countersunk (flat-head) fasteners represent the engineering baseline. Standardized globally under DIN 7991, ISO 10642, and ASME B18.6.3, countersunk screws integrate a 90-degree (metric) or 82-degree (imperial) conical transition beneath the driven head. When countersunk fasteners are manufactured from titanium alloys—predominantly Grade 5 (Ti-6Al-4V, Werkstoff 3.7165) and Grade 2 Commercially Pure (UNS R50400)—the resulting components provide an unmatched mechanical strength-to-weight ratio coupled with nonpareil electrochemical corrosion resistance.
Unlike standard alloy steels or high-tensile fasteners (Class 8.8, 10.9, or 12.9) that demand electrolytic zinc coatings or cad-plating to prevent environmental oxidation, titanium forms an instantaneous, self-healing stoichiometric oxide film (α-TiO2) across its entire boundary surface within milliseconds of atmospheric exposure. This passivated barrier maintains exceptional chemical stability across chlorides, nitric acids, industrial sulfates, and marine atmospheres. Crucially, in countersunk geometries where the head sits flush in high-contact machined chamfers, the microscopic oxide film suppresses fretting oxidation and crevice corrosion under persistent atmospheric fluctuation.
Key Engineering Formula: Titanium Grade 5 possesses an ultimate tensile strength exceeding 895 MPa at a density of only 4.43 g/cm³, resulting in a specific structural strength of ~202 kN·m/kg—over double the specific strength of 316L stainless steel (~75 kN·m/kg) and significantly exceeding normalized 10.9 hardened carbon steel (~130 kN·m/kg).
Cold-forged and precision-CNC-turned Grade 5 countersunk screws address the acute vulnerability often encountered in generic countersunk fasteners: stress concentrations at the junction where the tapered head merges into the straight-line cylindrical shank. At Yevzo Titanium Metal Co., Ltd., this critical transition zone features a strictly radius-blended underhead curvature conforming to aerospace micro-fillet thresholds. By rolling screw threads after thermo-mechanical heading rather than subtractive machining, our metallurgical grain flow remains uninterrupted along the tooth roots, delivering a minimum 35% higher rotational fatigue threshold under cyclic stress amplitudes.
| Mechanical & Physical Property | Gr5 (Ti-6Al-4V) Fastener | Gr2 Commercially Pure Ti | AISI 316 Stainless Steel | Grade 10.9 High-Tensile Steel |
|---|---|---|---|---|
| Density (g/cm³) | 4.43 | 4.51 | 8.00 | 7.85 |
| Yield Strength Rp0.2 (MPa) | 828 – 910 | 275 – 350 | 220 – 290 | 900 – 940 |
| Tensile Strength Rm (MPa) | 895 – 1050 | 345 – 450 | 520 – 680 | 1000 – 1040 |
| Modulus of Elasticity (GPa) | 110 – 114 | 105 – 108 | 193 – 200 | 205 – 210 |
| Mass Reduction vs. Steel (%) | -43.6% | -42.5% | Reference (0%) | Reference (0%) |
| Corrosion Rate in Cl⁻ Media | < 0.001 mm/year (Immune) | < 0.001 mm/year | Pitting Risk Present | Catastrophic Oxidation |
2. Industrial Ecosystem of Daegu: Application Scenarios for Flat-Head Fasteners
Daegu Metropolitan City, anchored by the North Gyeongsang industrial corridor, stands as South Korea's premier hub for advanced automotive component manufacturing, industrial robotics, intelligent high-precision tooling, and medical device commercialization. As Daegu accelerates its technological transformation through dedicated manufacturing corridors such as the Daegu National Industrial Complex (대구국가산업단지), Seongseo Industrial Complex (성서산업단지), and the Daegu Gyeongbuk Free Economic Zone (DGFEZ), precision fastening demands have shifted radically from standard mass-commodity steel to performance-grade metallurgical titanium.
E-Mobility & Battery Modules
Within Daegu's rapidly growing EV battery and powertrain supply chains, flush-mount Grade 5 titanium countersunk screws provide aerodynamic underside sealing. Non-magnetic characteristics eliminate magnetic-eddy interference in automated battery swap modules and high-voltage inverter assemblies.
High-Speed Robotics & SCARA End-Effectors
Daegu hosts global leaders in robotic mechanisms. When high-cycle automated robotic arms operate at extreme accelerations, titanium countersunk bolts reduce end-effector rotational inertia, eliminating mechanical deflection and drastically decreasing cycle runtimes without sacrificing joint rigidity.
Precision Tooling & Spindles
Seongseo’s machine tooling leaders employ flush countersunk screws inside precision lathe turrets, five-axis milling clamps, and grinding spindle covers. Titanium’s damping capacity mitigates tool chatter and resonant harmonic vibration across ultra-high-RPM operations.
In addition, the Daegu-Gyeongbuk Medical Innovation Foundation (K-Medihub) represents a dynamic growth vector for biocompatible hardware. Titanium Grade 2 and Grade 5 countersunk screws are extensively deployed in analytical instruments, surgical housing modules, diagnostic centrifuges, and cleanroom automation platforms where steel-induced rust flakes, zinc emissions, or autoclave corrosion cannot be tolerated.
3. Sourcing Logistics: Why Daegu Importers Partner Directly with Baoji Manufacturers
South Korea’s precision hardware distributors and procurement managers face chronic cost inflation when relying on domestic secondary rerollers or Western stockists. Direct factory procurement from Baoji, Shaanxi—universally recognized as China’s "Titanium Valley"—fundamentally transforms the unit economics of supply. China currently controls over 50% of global titanium sponge output, and Baoji clusters more than 300 specialized non-ferrous material laboratories, hot-extrusion mills, and precision CNC manufacturing centers.
Yevzo Titanium Metal Co., Ltd. sits directly at the center of this supply ecosystem. Because our raw ASTM B348 Grade 5 bars are sourced locally with verified heat-lot pedigrees, Daegu OEMs bypass multiple distributor markups. Our automated cold heading machines, vacuum annealing retorts, and multi-axis Swiss-type turning centers ensure complete vertical integration: ingot processing to final ultrasonic packaging occur under a unified ISO 9001 certified roof.
Logistics Velocity to Daegu: Direct air freight from Xi’an (XIY) to Incheon (ICN) or Gimhae (PUS) enables rapid customs clearing into Daegu within 48 to 72 hours. Bulk cargo routed via Qingdao or Tianjin port reaches Busan Port in just 2 business days, followed by instant same-day bonded trucking across the Gyeongbu Expressway corridor straight into Daegu’s industrial zones.
4. Daegu Procurement Engineer FAQ: Technical & Commercial Criteria
To assist South Korean purchasing directors, mechanical designers, and quality assurance inspectors, our chief metallurgists have synthesized detailed answers to the most common sourcing inquiries received from Daegu-based manufacturing facilities.
Which head standard should be specified for countersunk titanium screws: DIN 7991 or ISO 10642?
While both specify flat-head hex-socket/torx countersunk screws with an included head angle of 90°, ISO 10642 introduces minor updates to head diameter, head height tolerances, and socket transition fillets to enhance high-torque structural integrity. For automated robotics or mechanical assemblies fabricated in Daegu, ISO 10642 is increasingly favored to prevent hex-driver stripping. Yevzo manufactures to DIN 7991, ISO 10642, and custom CAD drawings with CNC-milled or rolled 6g precision threads.
How do Daegu engineers prevent thread galling when installing titanium fasteners into aluminum blocks?
Titanium has a relatively low thermal conductivity and a tenacious surface oxide layer, which can induce micro-welding or galling under high-speed pneumatic assembly into materials like 6061-T6 or 7075 aluminum. We advise: (1) applying an anti-seize paste formulated with moly (MoS₂) or fluoropolymer, (2) utilizing Yevzo's PVD titanium nitride (TiN) or anodized surface finishes that act as lubricating boundary films, and (3) tightening to calibrated titanium-specific torque limits rather than standard structural steel tables.
How is galvanic corrosion avoided when titanium screws contact carbon-steel or magnesium components?
Titanium is electrochemically noble. When directly connected to active metals like magnesium, cast carbon steel, or zinc in damp, salt-laden atmospheres, galvanic degradation will target the surrounding base metal, not the screw. In Daegu's automotive battery packs or chassis assemblies, we recommend non-conductive phenolic/PTFE washers, insulating electro-coatings, or matching titanium hardware with composite substrates, passivated aluminum, or 300-series stainless subframes.
What chemical inspection documentation accompanies wholesale fastener shipments?
Every production lot delivered to Daegu arrives with an authentic EN 10204 3.1 Mill Test Certificate (MTC). This document verifies complete chemical composition (spectrographic breakdown of Ti, Al, V, Fe, C, N, H, O content) and mechanical properties including ultimate tensile strength (Rm), yield strength (Rp0.2), elongation percentage (A%), and Rockwell hardness (HRC). Third-party SGS or TÜV verification reports are provided upon request.
What are the standard lead times, MOQs, and Incoterms for export shipments to Daegu?
For standard catalogue metric sizes (M3 to M16) in Grade 5 plain or anodized finish, our factory MOQ starts at just 50 to 100 units. Custom blueprint CNC components normally require 200 units. Typical machining lead times span 10 to 15 business days. We routinely execute shipments under DDP Daegu (door-to-door delivery with Korean import tariffs and handling fully cleared), DAP, CIF Busan Port, or FOB Qingdao/Shanghai, accepting USD, EUR, and KRW wire payments.
5. Manufacturing Rigor: The Yevzo Titanium Enterprise Advantage
Operating continuously out of the Honeycomb Industrial Park within the Baoji High-Tech Development Zone since 2013, Yevzo Titanium Metal Co., Ltd. represents one of the premier direct-source manufacturers for non-ferrous engineering hardware. Our facility bridges the raw metallurgical advantages of Baoji's titanium supply lines with stringent precision machining disciplines.
Baoji Raw Material Purity
Direct melt-lot tracking from premium titanium sponge ingots. Every ASTM B348 bar undergoes 100% ultrasonic non-destructive flaw detection prior to shearing and heating, eliminating latent structural voids.
Precision CNC Machining
Our workshop houses over 100 high-precision multi-axis turning-milling centers, Swiss automatic screw units, and high-speed hydraulic heading systems capable of maintaining microscopic tolerances within ±0.01 mm.
Advanced PVD & Anodizing
In-house electrochemical surface anodizing and physical vapor deposition (PVD) provide protective and decorative hard-surface finishes in burnt rainbow, electric blue, surgical gold, and diamond-like black.
End-to-End Quality Traceability
Multi-stage quality checks: raw material spectroscopy, optical coordinate measuring machines (CMM), dynamic thread optical sorters, and destructive tensile bench testing ensure zero defect escape to overseas docks.
We believe in "Titanium concentration, service intention." When partnering with Daegu enterprises, our engineering team provides comprehensive collaborative CAD design reviews, feasibility analyses, and material selection recommendations before chips ever fly on the production line.
Request a Technical Quote for Daegu Deliveries
Send our application engineering team your CAD drawings (STEP, DWG, PDF), required titanium grade (Gr2, Gr5, Gr7), finish criteria, and target batch volume. We provide full DDP Daegu pricing and manufacturing feasibility proposals within 24 hours.