Class 8.8 / 10.9
Titanium Alloy Gr5 M12 M14-1.5x30 Hex Lug Bolts Plain Finish Class 8.8 High Strength
- Thread Pitch: M12 / M14 x 1.5
- Material: Ti-6Al-4V Gr5
- Application: Powertrain / Hub
Certified Fastener Portfolio
High-Performance Titanium Engine & Chassis Bolts
Engineered from ASTM B348 Grade 5 (Ti-6Al-4V) bars via 5-axis CNC machining and precision cold thread rolling. Optimized for reciprocating engine internals, unsprung powertrain hardware, and extreme thermal cycling.
Class 10.9 / 12.9
GR5 Titanium Alloy Anodized Brake Bolts for Motorcycle Modified High Performance Class 10.9 & 12.9
- Surface: Hard Anodized / PVD
- Tensile: 950–1050 MPa
- Application: Brake Caliper & Rotor
ISO 4018 Direct
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
- Sizes: M8 – M16 Custom
- Tolerance: ISO 965 6g
UNC Flat Head
GR5 Titanium Wheel Lug Bolts Lightweight High Strength Flat Head UNC for Custom Wheels
- Thread: UNC / Metric Optional
- Head: Precision Flat / Tapered
- Application: Custom Wheel / Engine Case
PVD Flange
ZFTI Class 8.8 Gr5 Titanium Flange Bolt Anodized PVD Hex Head UNF Thread CNC Machined Motorcycle Custom Manufacturer
- Profile: Hex Flange (DIN 6921)
- Finish: PVD Burnt Titanium / Blue
- Machining: Swiss Multi-Axis CNC
Torx / Star Drive
M8 Titanium Torx Head Motorcycle Bolt Gr5 CNC Anodized PVD Star Screw for Bike Modification OEM Manufacturer
- Drive Type: Anti-Camout Torx T40/T45
- Thread: M8 x 1.25 Rolled
- Corrosion: 1000h+ Salt Spray Imm
High Heat Disc
Titanium Bolts Motorcycle Brake Disc Bolt M6 X 20mm for Brake Disc Bolt Screw
- Dimensions: M6 x 20mm Low Profile
- Yield Stress: 830 MPa at 300°C
- Use: Direct Rotor Clamping
Automotive Racing
Manufacturer with Nice Surface Titanium Lug Wheel Bolts M14x1.5 for Racing Cars Titanium Wheel Bolt M12 1.25 for Automobile
- Drive Style: Taper / Ball Seat Cone
- Thread Pitch: M12x1.25 / M14x1.5
- Certification: MTR / 3.1 EN10204
Industrial Benchmarking
Top 10 Titanium Engine Bolts Manufacturers & Suppliers
Comprehensive metallurgical assessment, technical manufacturing capacities, and OEM procurement profiles for mission-critical internal combustion and hybrid propulsion assemblies.
#01
Yevzo Titanium Metal Co., Ltd.
Established in 2013 inside the world's dense titanium metallurgical hub, Yevzo integrates vacuum arc remelting (VAR) raw-stock verification directly with over 100 high-speed CNC turning-milling centers. Specializing in ASTM B348 Grade 5 (Ti-6Al-4V) engine studs, connecting rod bolts, and cylinder head bolts with rolled threads according to ISO 965 and MIL-S-8879 specifications. Provides complete heat lot traceability, custom PVD/anodization, and factory-direct engineering support without broker premiums.
#02
Automotive Racing Products (ARP)
A world-recognized benchmark in high-tensile motorsport fasteners. ARP manufactures proprietary heat-treated titanium engine hardware primarily for top-fuel drag racing, Formula 1, and IndyCar applications. Their patented rolled thread profiles after heat treatment provide extreme cyclic fatigue life, though lead times and boutique pricing dictate premium aftermarket procurement channels.
#03
Lisi Aerospace
An AS9100-certified global leader specializing in aerospace-grade titanium engine casing bolts, shear bolts, and hot-section turbine fasteners. While delivering peerless metallurgical reliability and compliance with aerospace propulsion programs (Safran, GE, Rolls-Royce), their minimum order volumes and aerospace certification lead cycles present barriers for agile commercial vehicle development.
#04
SPS Technologies (PCC Fasteners)
SPS produces mission-critical fasteners engineered for severe engine vibrational and high-temperature environments. Their titanium line includes high-strength bolts utilizing aerospace cold working and specialized shank-to-head fillets that resist shear separation under massive dynamic impulse loading in performance engines.
#05
Böllhoff Group
Renowned for assembly automation and multi-material joint engineering. Böllhoff develops specialized lightweight titanium fasteners for premium European sports sedans, electric vehicle battery trays, and high-rpm motorcycle engine heads, excelling in galvanic decoupling solutions when joining titanium directly into magnesium casings.
#06
Pro-Bolt Motorsport Hardware
Extensively supplied across MotoGP, World Superbike, and British Superbike teams. Pro-Bolt produces drop-forged and CNC-machined Grade 5 titanium bolts tailored for engine side covers, triple trees, and brake disc configurations, renowned for exquisite drilled race-spec heads and vibrant physical vapor deposition (PVD) finishes.
#07
Howmet Aerospace (Formerly Alcoa)
Pioneers in high-strength titanium alloy formulations and lockbolt technologies. Howmet engineers heavy-duty structural titanium engine mounting systems and crankcase anchors capable of absorbing massive harmonic shocks and high thermal shifts found in commercial diesel, aerospace hybrid, and defense power plants.
#08
Fabory Group
Operating one of Europe's largest distribution footprints, Fabory supports precision powertrain builders with standardized ISO and DIN metric titanium bolts. Their advanced technical testing labs provide chemical spectrography and dimensional verification for industrial machinery, hypercar engine tuners, and high-vacuum equipment.
#09
Tsubaki Nakashima Co., Ltd.
Specializes in Japanese industrial-grade ultra-precision fasteners, micro titanium screws, and specialized cam-gear bolts. Their production standards mandate near-zero runout tolerances and micro-finishes (Ra < 0.2 μm) on bearing retaining hardware, valve-train retainers, and high-frequency robotic actuator assemblies.
#10
Bufab Supply Chain Solutions
Bufab acts as a full-service C-Parts provider offering supply chain integration, vendor-managed inventory (VMI), and tailored titanium fastener procurement. They specialize in multi-point sourcing validation for automotive tier suppliers, balancing cost optimization across Asian manufacturing lines and European assembly plants.
Titanium Grade Selection Guide vs. Fastener Standards
| Mechanical Parameter | Gr2 (CP Titanium) | Gr5 (Ti-6Al-4V) | Steel Class 8.8 | Steel Class 10.9 |
|---|---|---|---|---|
| Tensile Strength (Min) | 345 MPa | 895 – 1000 MPa | 800 MPa | 1040 MPa |
| Yield Strength (0.2%) | 275 MPa | 828 – 910 MPa | 640 MPa | 940 MPa |
| Density (g/cm³) | 4.51 g/cm³ | 4.43 g/cm³ | 7.85 g/cm³ | 7.85 g/cm³ |
| Weight Reduction | -42.5% | -43.6% | Baseline (0%) | Baseline (0%) |
| Fatigue Notch Factor | Moderate | Superior (Rolled) | Standard | Standard |
| Max Operating Temp | 250°C | 400°C | 300°C | 350°C |
| Corrosion Resistance | Total (Salt/Acid) | Total (Bio/Chloride) | Requires Plating | Requires Plating |
| Recommended Engine Zone | Fluid Casing / Cover | Internal / Rotating | Non-Critical Frame | Structural Head Bolt |
Data derived per ASTM B348/B348M (Standard Specification for Titanium and Titanium Alloy Bars) and ISO 898-1 for carbon steel bolts. Grade 5 titanium demonstrates an unmatched strength-to-weight ratio for reciprocating and unsprung mass reduction.
Manufacturing Engineering
Cut Thread vs. Cold Rolled Threads
For engine applications subjected to repetitive cyclic fatigue—such as connecting rods, cylinder head studs, and camshaft sprocket anchors—machining threads via single-point CNC cutting creates micro-grooves and grain interruptions that initiate fatigue stress cracks.
The Yevzo Standard: We utilize precision cold thread rolling under high hydraulic pressure following multi-axis CNC body turning. Thread rolling forces the titanium alpha-beta grain flow lines to follow the thread flank contours uninterrupted, imparting compressive residual surface stress and boosting fatigue endurance limits by up to 35% over cut threads.
Market Outlook 2025–2030
Emerging Procurement & Technology Trends in Titanium Fasteners
Strategic analysis of lightweighting imperatives, supply chain resilience, and advanced surface metallurgy influencing industrial procurement directors worldwide.
EV Rotational Mass Sourcing
With electric vehicle (EV) architectures prioritizing watt-hour efficiency, OEM engineering teams are shifting away from high-strength steel hub, motor-rotor, and transmission bolts. Sourcing Grade 5 titanium reduces rotational inertia by 44%, resulting in immediate regenerative braking and acceleration improvements.
Advanced Anti-Galling & PVD Barriers
Historically, titanium threads presented micro-welding (galling) risks under aggressive dry torquing into aluminum or steel. Modern OEM demands have shifted toward Physical Vapor Deposition (PVD) titanium nitride (TiN) and diamond-like carbon (DLC) dry-lubricant coatings that stabilize friction coefficients (μ = 0.10–0.12).
Full Mill-Origin Traceability Mandates
Driven by strict automotive IATF 16949 and aerospace compliance, corporate buyers increasingly reject unverified spot-market suppliers. Sourcing protocols now demand direct melt-source traceability to sponge titanium producers, eliminating scrap-metal re-melt contamination that can cause catastrophic internal fastener shear.
Verified Manufacturer Value
Why Industrial Buyers Partner with Yevzo
Yevzo Titanium Metal Co., Ltd. operates from Honeycomb Industrial Park inside the High-Tech Development Zone of Baoji, Shaanxi—widely revered as China's "Titanium Valley." This geographic proximity allows us to access certified ASTM B348 titanium bars within hours of ingot casting and ultrasonic testing.
Operating continuously since 2013, we unite primary material procurement, multi-axis CNC machining, centerless grinding, cold thread rolling, and electrochemical anodizing under a unified, audited quality management framework.
True Source Factory
Direct production floor without trading middlemen or markup.
Over 100 CNC Units
Swiss multi-axis turning, CNC milling, and high-speed tapping lines.
Custom OEM/ODM
Precision manufacturing from 2D/3D drawings (STEP, DWG, PDF).
Global Trade Terms
FOB, CIF, EXW, DDP, and DDU delivery with flexible payment modes.
Procurement Intelligence
Frequently Asked Questions for Titanium Engine Fastener Sourcing
Essential guidance on metallurgy, tightening torque adjustments, minimum order quantities, and galvanic isolation protocols.
Why is Grade 5 (Ti-6Al-4V) mandatory over Grade 2 for engine bolts?
Grade 2 is commercially pure titanium offering roughly 345 MPa yield strength. While highly corrosion-resistant, its structural yield is insufficient for dynamic tensile clamping in internal combustion engines. Grade 5 (Ti-6Al-4V) is an alpha-beta dual-phase alloy heat-treatable to tensile levels exceeding 895–1000 MPa, surpassing standard Class 8.8 and rivaling Class 10.9 structural bolts while delivering a 44% mass reduction and higher elevated-temperature stability (up to 400°C).
How should assembly tightening torque be calculated for titanium fasteners?
Because titanium has an elastic modulus of approximately 114 GPa (roughly half that of alloy steel at 210 GPa), a titanium bolt stretches more per unit of applied load. Furthermore, dry titanium exhibits higher unlubricated friction against steel or aluminum. Fastener engineers must always specify a high-temperature molybdenum disulfide (MoS2) or copper-based anti-seize paste, reducing standard dry steel torque values by 15% to 20% to achieve identical target preload clamp force without thread yielding.
How do you mitigate galvanic corrosion when screwing titanium into aluminum engine blocks?
Titanium is electrochemically noble (+0.05V vs. standard hydrogen electrode) relative to aluminum (-1.66V). In the presence of an electrolyte (such as road brine or salt spray), the aluminum casing can act as a sacrificial anode. To completely isolate this interface, Yevzo provides physical vapor deposition (PVD), hard barrier anodization, non-conductive ceramic washers, and zinc-free dialectric thread sealants that eliminate conductive electrolyte contact.
What are the minimum order quantities (MOQ) and production lead times?
For standard catalog items (e.g., ISO 4018 hex bolts, DIN 6921 flange screws, M12/M14 lug bolts), MOQ starts as low as 10 to 30 pieces for stocked bar diameters. For custom OEM parts manufactured directly from customer CAD drawings or prototypes, minimum runs typically begin at 50 to 100 pieces. Rapid prototyping batches ship via air express within 7 to 10 business days; full production lots typically dispatch within 15 to 25 days.
Which inspection certifications and testing documentation accompany each shipment?
Every production batch includes full material test reports (MTR) confirming chemical spectrography and mechanical tensile performance compliant with EN 10204 3.1. Dimensional inspection protocols verify thread pitch diameters via GO/NO-GO optical gauges (ISO 965 Class 6g standards), surface roughness profiles (Ra < 0.4 μm), and ultrasonic defect scans for aerospace-designated orders upon request.
Request Engineering Quote & Material Samples
Send your CAD files (STEP, IGES, DWG) or standard specifications. Our Baoji factory metallurgists and tooling engineers respond with technical quotes within 24 hours.