Industrial Pure
Export Series Showcase
Precision Titanium Fasteners & CNC Hardware
Engineered specifically for extreme torsional rigidity, non-magnetic performance, and zero-corrosion industrial environments in South Jeolla.
Ti-6Al-4V Gr5
PVD Anodized
DIN / GB Metric
CNC High-Precision
5-Axis Milling
Lightweight Flange
12-Point Motorsport
Engineering Whitepaper
Titanium Set Screws: Technical Parameters & Mechanical Integrity
An authoritative analysis of headless locking mechanics, metallurgy, and shear-torque performance for South Korean precision assemblies.
Material Selection: Gr5 (Ti-6Al-4V) vs. Gr2
Commercial set screws rely on headless configurations (DIN 913, DIN 914, DIN 915, DIN 916) driven by internal hex or Torx (six-lobe) sockets. In the Gwangju engineering sector, Grade 5 (Ti-6Al-4V) is the preferred choice where dynamic shear forces occur. With a minimum tensile yield strength of 828 MPa and an ultimate strength exceeding 895 MPa, Grade 5 matches class 8.8 and 10.9 structural steels while reducing rotating mass by 44% (density: 4.43 g/cm³).
Conversely, for optical instrumentation, medical laboratory machinery, and non-magnetic sensory modules, Commercially Pure Grade 2 titanium is supplied to ensure complete antimagnetic neutrality and immunity against galvanic cell corrosion.
Headless Geometries & Point Profiles
Our CNC-turned titanium set screws feature specialized contact points calibrated for specific shaft retention demands:
- Cup Point (DIN 916): Yields a 360-degree biting ring into hardened shafts for maximum axial and torsional lock under heavy vibration.
- Cone Point (DIN 914): Provides precise axial locating by penetrating conical detents in high-rpm armature systems.
- Flat Point (DIN 913): Delivers uniform surface pressure without damaging fine-ground shafts or anodized sleeves.
- Dog Point (DIN 915): Acts as a guide pin mating with keyways to prevent backlash without clamping the journal surface.
Thread Rolling vs. Micro-CNC Thread Turning
Unlike standard die cutting which tears the crystalline grains of Grade 5 titanium, our fasteners undergo controlled thread rolling for standard sizes (M3 to M14). Thread rolling compresses the metallurgical grain structure along the root contour, increasing fatigue resistance by up to 35% and mitigating the risk of notch-sensitivity failure in high-cycle vibration environments.
For custom non-standard pitches or ultra-short miniature set screws used in photonics, our multi-axis Swiss-lathe turning centers execute thread whirling with cryogenic cooling, achieving pitch circle runout within 0.005 mm and clean socket broaching that eliminates driver slippage.
| Standard Specification | Material Grade | Thread Sizes Available | Point Types | Tensile Strength (Yield) | Drive Options |
|---|---|---|---|---|---|
| DIN 913 / ISO 4026 | Ti-6Al-4V (Gr5) / Pure Gr2 | M2.5 – M16 (Custom Pitch) | Flat Point | ≥ 828 MPa (Gr5) | Hex Socket / Torx (T6–T50) |
| DIN 914 / ISO 4027 | Grade 5 (TC4) Annealed | M3 – M14 (UNC/UNF Option) | Cone Point (90° / 120°) | ≥ 895 MPa (Tensile) | Hexagon Socket |
| DIN 915 / ISO 4028 | Grade 5 / Grade 23 (ELI) | M3 – M12 | Full Dog / Half Dog | ≥ 860 MPa | Hex Socket |
| DIN 916 / ISO 4029 | Grade 5 Ti-6Al-4V | M2 – M16 | Knurled Cup / Plain Cup | ≥ 895 MPa | Internal Hex / Six-Lobe Torx |
15+
Years Precision Manufacturing
34Sets
Multi-Axis CNC Machining Centers
0.005mm
Ultra-Tight Machining Tolerance
≤9Hours
Direct Technical Engineering Response
Regional Industrial Alignment
Localized Applications Across the Gwangju Industrial Ecosystem
Bridging China's Titanium Valley material supply chain with South Korea's high-tech manufacturing capital.
Automotive Precision Assembly (Gwangju Global Motors & EV Hub)
Gwangju's Bitgreen National Industrial Complex has emerged as an engine of South Korea's eco-friendly electric mobility transition. In battery electric vehicles (BEVs) and advanced driver-assistance systems (ADAS), our titanium set screws serve critical functions. Grade 5 titanium set screws secure high-speed lidar sensor brackets, steering rack adjusters, and brushless motor rotors where rotational inertia must be minimized. The non-corrosive nature of titanium ensures zero galvanic corrosion when mated with carbon fiber reinforced composites or aluminum castings.
Photonics, Laser Optics & Semiconductor Tooling
Regarded as the "Photonics City of Korea", Gwangju hosts a high density of optical fiber, laser transceiver, and optoelectronic equipment manufacturers. In optical collimators, laser beam splitters, and microscope stages, even minute thermal expansion or magnetic interference degrades micro-radian accuracy. Vunza's Grade 2 and Grade 5 micro set screws (sizes M1.6, M2, M2.5, M3) provide absolute antimagnetic security and a thermal expansion coefficient (8.6 × 10-6/K) nearly half that of austenitic stainless steel, guaranteeing permanent focal stability.
Smart Robotics & Industrial Automation (Hanam & Cheomdan Complexes)
Inside the Hanam and Cheomdan Industrial Complexes, high-speed pick-and-place delta robots and automated packaging machinery require hardware that withstands continuous high-cycle accelerations. Our DIN 916 knurled cup-point set screws deliver locking torque retention that prevents pulley and timing gear displacement during emergency deceleration stops, eliminating downtime for local manufacturing lines.
Strategic Procurement Trends in Gwangju's Manufacturing Sector
Procurement managers and lead design engineers across the Honam region are systematically transitioning from imported nickel-plated stainless steel fasteners to titanium alloys. Key market drivers include:
1. Extreme Mass Reduction in High-Speed Kinematics
Reducing un-sprung mass and rotational inertia allows servo-driven actuator systems in Gwangju's automated plants to achieve higher cycle rates without motor overheating.
2. Direct Supply Chain Traceability (Titanium Valley)
South Korean tier-1 automotive suppliers require origin certification from titanium sponge to bar stock, avoiding gray-market secondary remelts through certified EN 10204 3.1 mill test certificates.
3. Surface Galling Prevention
Adoption of specialized micro-arc oxidation (MAO) and physical vapor deposition (PVD) titanium coatings to prevent galling when set screws are repeatedly torqued into female aluminum threads.
Why Choose Vunza Titanium
Enterprise Advantages & Manufacturing Depth
Operating at the epicenter of China Titanium Valley with end-to-end quality control.
Prime Baoji Industrial Cluster
Established in 2008 adjacent to the Baoti Group Industrial Park, our plant commands direct access to premium titanium sponge and domestic melt resources, securing lower baseline material costs and total raw billet traceability.
Veteran Engineering Workforce
More than 50% of our production team members possess over 13 years of hands-on titanium machining experience. We understand the specific feed, speed, and chip-breaking characteristics necessary to prevent work-hardening of titanium.
34 Multi-Axis CNC Machine Center
Equipped with 3-, 4-, and 5-axis CNC machining centers, automated Swiss lathes, and high-precision thread rollers capable of holding dimensional tolerances to 0.005 mm across high-volume production batches.
Sponge-to-Part Quality Assurance
Stringent internal QC protocol covering incoming ultrasonic testing, chemical spectral analysis, first-article dimensional verification, and optical go/no-go thread inspection prior to vacuum packaging.
5.0 Verified Supplier Rating
Consistent 5.0/5.0 supplier rating over 13+ years of international export, with an average response time under 9 hours and full logistics integration to Incheon, Busan, and Gwangju via express air and sea freight.
Rapid Custom Prototyping
From CAD drawing review (DWG, STEP, IGES) to sample delivery in as few as 7 business days, including custom point angles, left-hand threads, internal Torx broaching, and electrolytic laser marking.
Procurement Guidelines
Frequently Asked Questions for Gwangju Buyers
Everything you need to know about lead times, import clearance, mechanical standards, and custom drawings.
What specific titanium grade is recommended for set screws in optical vs. automotive applications?
For automotive, robotics, and dynamic machinery located in Gwangju's automotive complexes, Grade 5 Ti-6Al-4V is strongly recommended due to its high tensile strength (≥895 MPa) and resistance to torsional shear. For high-precision optical sensors, medical instrumentation, or semiconductor laser arrays where antimagnetic neutrality and moderate clamping force are required, Commercially Pure Grade 2 titanium is ideal because it has zero magnetic permeability and excellent machining ductility.
How do you prevent thread galling (seizing) when titanium set screws are torqued?
Titanium has a natural tendency to gall when mated with titanium or aluminum without lubrication. To resolve this for South Korean clients, we offer specialized surface treatments including micro-arc oxidation, hard color anodizing, molybdenum disulfide dry-film lubrication coatings, and PVD diamond-like carbon (DLC) coatings. In addition, our rolled threads feature mirror-smooth root finishes (Ra ≤ 0.4 μm) that substantially reduce frictional friction during assembly.
What are your typical shipping lead times and door-to-door transit to Gwangju?
Standard stocked fastener items ship within 48 to 72 hours. Custom CNC-machined titanium set screws built to drawing typically take 10 to 18 business days depending on batch volume. We dispatch orders daily via direct air courier (DHL, FedEx Express, SF International) with customs clearance taking 2 to 4 business days to reach factories in Gwangju, Gwangyang, or Yeosu ports. LCL/FCL ocean freight is available through Qingdao/Shanghai to Busan Port for volume consolidation.
Do shipments include raw material certificates compliant with Korean inspection standards?
Yes. Every production run is accompanied by an EN 10204 3.1 Mill Test Certificate indicating exact chemical heat analysis (Ti, Al, V, Fe, C, N, H, O content) and mechanical tensile testing records. Dimensional CMM inspection reports, plating thickness certificates, and RoHS/REACH compliance documentation can also be provided on request.
What is your Minimum Order Quantity (MOQ) for custom non-standard set screws?
For standard catalog items, the MOQ is typically 100 to 500 pieces. For custom micro-fasteners, specialized socket profiles (e.g., tamper-proof Torx Plus), or bespoke length-to-diameter ratios, our flexible prototyping MOQ starts at 50 to 100 pieces to assist design engineers with initial bench testing and validation prior to volume release.
Can you manufacture imperial (UNC/UNF) set screws in addition to standard metric sizes?
Yes. We produce both standard metric threads (M1.6 up to M24 per DIN 913, 914, 915, 916) and American/unified threads (including #2-56, #4-40, 1/4"-20, 1/4"-28, 5/16"-24, 3/8"-16, 1/2"-20) to Class 2A / 6g thread fit standards. Custom pitch combinations can also be executed according to 2D/3D customer files.