Class 8.8
Precision Catalog
High-Performance Titanium Hardware Solutions
Engineered for high strength-to-weight efficiency, extreme thermal stability, and ultimate corrosion resistance across critical mechanical assemblies.
DIN 7991
DIN7991 Titanium Countersunk Flat Head Screw
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Wholesale
GR5 Titanium Alloy Standard Bolts & Nuts Assortment
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Class 10.9/12.9
GR5 Titanium Alloy Anodized Motorcycle Brake Bolts
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Precision
M5 M6 M8 Hexagon Head Bike Stem Screws
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CNC Machined
GR5 Titanium Alloy Socket Head Wear-Resistant Bolts
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Stepped
Hexagonal Step Flat Head Disc Brake Screws
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DIN 912
DIN912 M6 Burnt Blue Socket Head Cap Screws
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Precision Manufacturing Excellence
Rooted in China's Titanium Valley (Baoji)
Operating continuously since 2013, Yevzo Titanium Metal Co., Ltd. combines sovereign metal supply advantages with multi-axis CNC micro-machining capabilities.
2013
Established Year
100+
CNC Machining Centers
±0.005mm
Precision Tolerancing
5.0 / 5.0
Global Verified Rating
Direct Strategic Access to High-Purity Raw Material
Headquartered within the Honeycomb Industrial Park of Baoji High-Tech Development Zone, Yevzo is positioned at the epicenter of global titanium refining and forging. Our supply chain operates without intermediate steel brokers or trading friction. Every batch of Grade 2 (UNS R50400) and Grade 5 (Ti-6Al-4V, UNS R56400) commences with strict vacuum-arc remelted (VAR) ingots meeting ASTM B348, AMS 4928, and ISO 5832 standards.
Unlike standard set screws manufactured through cold-forging carbon wires, titanium set screws require advanced multi-axis CNC lathe turning, precise internal socket broaching, and cut/ground helical threads to eradicate micro-fissures and stress concentration planes. Our manufacturing floor houses specialized automatic Swiss-turn centers configured specifically for the difficult shear properties and lower thermal conductivity inherent to titanium alloys.
Source Factory Direct
No intermediaries. Direct technical consultation from CAD/STEP drawing analysis to finished threaded components with complete lot traceability.
High Yield Rolling & Turning
Engineered socket profiles including Hexagon, Torx (Star drive), Spline, and Slotted designs fabricated without micro-fracturing along internal corners.
Chemical Passivation & Anodizing
Electrolytic Type II and Type III anodization protocols that alter optical interference layers without dimensional deviation on thread pitch diameters.
Full Metallurgy Traceability
Mill Test Certificates (EN 10204 3.1) accompanying every dispatch documenting exact interstitial gas limits (O, N, C, H, Fe).
Engineering Whitepaper
Metallurgical Precision in Titanium Set Screw Fabrication
Understanding mechanical load distribution, galling mitigation, and point profile dynamics for specialized mechanical assemblies.
Set screws—often referred to as grub screws—perform an essential function in modern kinematics: transmitting torsional drive, securing rotating shafts against axial displacement, and locating precision optical or medical stages without head interference. However, selecting a custom OEM titanium set screw requires analyzing physical traits beyond those of standard structural hex bolts.
Set Screw Point Geometry & Application Dynamics
The retention mechanism of a headless set screw depends on the interface between its contact point and the mating shaft. At Yevzo, our CNC manufacturing line accommodates five distinct point geometries:
1. Cup Point (DIN 916 / ISO 4029): The most common geometry, featuring a specialized cutting rim that penetrates into the shaft surface for maximum locking integrity. Suited for semi-permanent assemblies subjected to dynamic vibration.
2. Cone Point (DIN 914 / ISO 4027): Features a sharp, conical profile designed to sink into a pre-drilled locating hole, providing maximum torsional resistance and rigid axial positioning.
3. Flat Point (DIN 913 / ISO 4026): Engineered for applications requiring frequent repositioning without scoring or marring hard chrome shafts, brass liners, or ceramic interfaces.
4. Dog Point & Half Dog (DIN 915 / ISO 4028): Features a cylindrical tip that registers into an internal slot or keyway, allowing rotational float while restricting axial movement.
| Parametric Metric | Gr2 Commercially Pure (CP) | Gr5 Alloy (Ti-6Al-4V) | AISI 316 Stainless (Ref) | Class 10.9 Steel (Ref) |
|---|---|---|---|---|
| Ultimate Tensile Strength | 345 – 485 MPa | 895 – 1000 MPa | 580 – 620 MPa | 1000 – 1040 MPa |
| Yield Strength (0.2% Offset) | 275 MPa min | 828 MPa min | 290 MPa min | 900 MPa min |
| Mass Density | 4.51 g/cm³ | 4.43 g/cm³ | 8.00 g/cm³ | 7.85 g/cm³ |
| Modulus of Elasticity | 105 GPa | 114 GPa | 193 GPa | 210 GPa |
| Corrosion in Seawater / Marine | Immune (< 0.001 mm/yr) | Immune (< 0.001 mm/yr) | Pitting Risk in Crevice | Severe Rusting |
| Magnetic Permeability | Non-magnetic (1.00005) | Non-magnetic (1.00005) | Slightly Paramagnetic | Ferromagnetic |
Tribology and Anti-Galling Directives for Titanium Fasteners
Titanium exhibits a rapid surface passivation mechanism, spontaneously producing an adherent titanium dioxide (TiO₂) film upon oxygen exposure. While this imparts corrosion resistance, it can cause clean titanium surfaces to micro-weld under extreme contact pressure—a state known as galling or cold welding.
When specifying custom OEM set screws, our engineering team mandates precise thread lead-in chamfers (30° to 45° angle) to avoid thread cross-binding. For critical installations involving titanium-into-titanium threads, we recommend factory-applied anti-seize lubricants (such as molybdenum disulfide or ceramic paste) or specialized surface conversion processes, including thin-film PVD coatings (TiN, TiAlN, DLC) and Micro-Arc Oxidation (MAO) to enhance surface hardness past 65 HRC.
Procurement Intelligence
Future Trends Shaping Titanium Set Screw Sourcing
Strategic structural shifts across robotics, e-mobility, semiconductor fabrication, and clean hydrogen infrastructure driving micro-fastener demand.
Sub-Miniature Robotics & Precision Drones
The expansion of surgical robotics, collaborative lightweight arms (cobots), and high-maneuverability UAVs requires strict reductions in rotational inertia. Designers are replacing traditional hardened alloy steel set screws with Gr5 titanium. This reduces reciprocating mass by over 40% while preserving clamping retention at high torque limits.
Extreme Vacuum & Cleanroom Hardware
Semiconductor lithography, advanced microscopy, and satellite optical payloads operate in high-vacuum environments where zinc or cadmium plated steel fasteners outgas toxic contaminants. Passivated, ultrasonic-degreased Grade 5 titanium set screws maintain structural stability without volatile residue or non-magnetic interference.
Electrification & Hydrogen Electrolyzers
With the rapid shift toward high-voltage electric propulsion and PEM hydrogen electrolysis stacks, fasteners must withstand aggressive chemical exposures, stray currents, and localized chlorine salts. Titanium set screws provide stability without the stress-corrosion cracking seen in austenitic stainless steels.
Buyer Knowledge Base
Frequently Asked Questions Regarding Custom Titanium Set Screws
Technical guidance direct from Yevzo's engineering and metallurgical quality control teams.
What is the key mechanical difference between Gr2 and Gr5 titanium set screws?
Grade 2 is commercially pure (CP) unalloyed titanium with a minimum tensile yield strength of 275 MPa. It offers chemical formability and corrosion resistance in marine, seawater, and chemical piping environments, but cannot support high shear clamping loads. Grade 5 (Ti-6Al-4V) is an alpha-beta alloy heat-treated to an ultimate tensile strength exceeding 895 MPa, matching the clamping force of Class 8.8 and Class 10.9 steel fasteners while remaining non-magnetic and 44% lighter. Gr5 is our primary recommendation for rotating components, robotics, and cycling/motorsport assemblies.
Can Yevzo manufacture custom micro-size set screws (e.g., M1.6, M2, M2.5)?
Yes. Our Baoji manufacturing facility runs dedicated high-precision Swiss-type CNC lathes equipped with high-RPM spindles and fine optical tool monitoring. We produce metric threads from M1.2 through M24, and Imperial UNC/UNF threads from #0-80 up to 1 inch. Socket drive types include micro-hex, Torx (T1 through T30), and precision slots with tight concentricity tolerances within ±0.005mm.
How does anodizing affect the thread tolerances of a titanium set screw?
Unlike anodizing aluminum, which builds an external oxide layer that alters dimensions, titanium anodizing is an electrolytic process that modifies the naturally occurring titanium dioxide (TiO₂) film through light interference. The thickness variation typically ranges between 10 to 200 nanometers, which is virtually negligible. It does not alter ISO 965 Class 6g or Class 4h thread pitch limits, ensuring seamless fit into precision threaded holes.
What is the minimum order quantity (MOQ) for custom OEM drawing-based set screws?
For catalog items and standard DIN 913, 914, 915, and 916 screws in standard metric sizes, our MOQs start between 20 to 50 pieces. For custom OEM parts requiring specific bar stock diameters, non-standard dog points, or proprietary drive geometries, the typical prototyping MOQ is 100 to 200 pieces, scaling to thousands for full production runs with volume discounts.
How does Yevzo control the risk of galvanic corrosion when mating titanium set screws to aluminum?
Because titanium is electrochemically noble compared to aluminum, contact in the presence of an electrolyte can accelerate aluminum corrosion. We provide design support to address this, recommending non-conductive thread lock coatings, specialized barrier anodization, or isolation sleeves. In non-aqueous, dry operating conditions or clean room setups, galvanic corrosion risks remain minimal.
What documentation and quality certifications accompany international export shipments?
Every export shipment is backed by a full inspection report, including EN 10204 Type 3.1 Mill Test Certificates verifying raw material melt chemistry and mechanical properties. In addition, we provide dimensional inspection sheets produced via optical comparators and CMM equipment, RoHS/REACH compliance documentation, and Commercial Invoice/Packing Lists matched to the customer’s specified Incoterm (FOB, CIF, CFR, DDP).
Ready to Engineer Your Custom Titanium Solution?
Submit your 2D drawings (PDF, DXF) or 3D models (STEP, IGES) alongside your intended application requirements. Our senior application engineers will provide DFM feedback, tolerance validation, and quotation within 24 hours.