Grade 5 Titanium Shoulder Button Head Bolts for Motorcycles
Key Features
● Accurate Alignment for Reduced Vibration
The shoulder positions components precisely, reducing movement and vibration. Lateral loads pass through the shoulder, protecting threads and keeping titanium shoulder bolts reliable under repeated stress.
● Controlled Clamping for Surface Protection
The shoulder height provides a natural tightening limit, allowing clamping force to remain consistent and repeatable. This structure helps reduce surface damage caused by over tightening during installation or routine maintenance.
● Lightweight Grade 5 Titanium with PVD Finish
Made from Grade 5 titanium, these titanium shoulder bolts weigh roughly 57% less than steel fasteners, reducing unsprung mass and improving handling. PVD coating resists corrosion and maintains a high-quality look over time.
● Low-Profile Button Head Design
The low-profile button head fits tight spaces, preventing interference during installation or maintenance. Its consistent height ensures repeatable assembly and protects components, supporting high-end motorcycle builds and reducing costly rework.
Installation & Maintenance Guidance
● Seat the Shoulder Properly. Tighten each bolt until its shoulder contacts the mounting surface. Don’t apply extra torque, as it may damage panels or nearby components.
● Use Threadlocker on Brake Components. Apply medium strength threadlocker when installing Titanium Shoulder Bolts on brake discs and calipers. Follow OEM torque specs to ensure reliable performance under heat and repeated braking.
Technical Specifications
1. Material & Mechanical Properties
Parameter |
Details |
Material |
Grade 5 Titanium (Ti-6Al-4V) |
Density |
4.43 g/cm³ |
Tensile Strength |
≥ 900 MPa |
Yield Strength |
≥ 830 MPa |
Hardness |
33–36 HRC |
Corrosion Resistance |
Excellent |
Reference Standards |
ISO Metric Thread |
2. Dimensional & Thread Data
Parameter |
Details |
Diameter Range |
M6 / M8 (other diameters available upon request) |
Length Range |
Thread length 15–35 mm |
Shoulder Height |
3–5 mm (varies by model) |
Thread Pitch |
M6: 1.0 / M8: 1.25 |
Thread Type |
Metric Coarse |
Drive Type |
Internal Hex |
Tolerance |
ISO 6g |
3. Finishing & Customization Options
Parameter |
Details |
Finish Options |
Burnt Blue / Black / Gold / Natural (other colors on request) |
Processing Method |
Polished / Anodized / PVD |
Logo Engraving |
Available |
Packaging |
Bulk cartons / Custom retail sets |
OEM Customization |
Supported (shoulder size, finish, thread length) |
Application Scenarios
1. Motorcycles
● Brake Disc Mounting
For motorcycle brake discs, the shoulder on these titanium shoulder bolts takes the shear load during hard braking rather than the threads. This helps keep the rotor properly aligned and reduces stress on the bolt in extreme braking conditions.
● Fairings and Body Panels
When fastening fairings or body panels, the shoulder serves as a depth limiter. It helps reduce hole wear caused by vibration and lowers the risk of panel damage from over tightening.
2. Bicycles / MTB & Precision Engineering
● Precision Positioning Under Repeated Assembly
In suspension pivot points and lightweight racing disc brake connections, titanium shoulder bolts help keep parts properly positioned. They also make repeated installation more consistent when components need to be removed and refitted.
Application Scenarios
Q1. What is the purpose of the shoulder design on these bolts?
A: The shoulder section provides a smooth locating surface between the bolt and the mounting hole. It improves positioning accuracy and provides stable support for assemblies that require precise alignment.
Q2. When should I choose a shoulder button head bolt instead of a standard button head bolt?
A: A shoulder design is suitable for applications that require accurate positioning and a defined seating area. A standard button head bolt is suitable when full thread engagement is the main requirement.
Q3. What should be considered when using shoulder button head bolts for brake disc mounting?
A: The shoulder diameter and length should match the brake disc mounting requirements. Correct dimensions help ensure proper positioning and reliable fastening.
