Grade 5 Titanium Countersunk Head Bolts for Motorcycles and Bicycles - China Suppliers and Factory
Key Features
Installation & Maintenance Guidance
- When positioning the bolt, start threading it by hand so the countersunk head settles flush before applying full torque with tools.
- Check whether the panel holes and seating surfaces are flat and free of burrs; uneven edges will affect fit of the countersunk screws.
- For exterior mounting points, we recommend checking the torque and surface condition annually to keep the flush interface secure.
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 | 34–36 HRC |
| Corrosion Resistance | Excellent (moisture, salt, mild chemicals) |
| Standards Compliance | DIN 7991 / ISO 10642 (Countersunk Head) |
2. Dimensional & Thread Data
| Parameter | Details |
| Diameter Range | M5–M8 |
| Length Range | 10–25 mm |
| Thread Pitch | 0.8–1.25 mm |
| Thread Type | Metric Coarse / Fine |
| Drive Type | Hex Socket (internal) |
| Tolerance | ISO 6g (external threads) |
3. Finishing & Customization Options
| Parameter | Details |
| Surface Finish | Natural Titanium / Polished / Anodized / PVD Coating |
| Logo Engraving | Available |
| Packaging | Bulk cartons / Custom retail sets |
| OEM Customization | Supported (thread type, head style, finish, length) |
Application Scenarios
Frequently Asked Questions
These bolts are made of high-quality Grade 5 Titanium (Ti-6Al-4V), offering a low density of 4.43 g/cm³, tensile strength ≥ 900 MPa, and excellent resistance to corrosion from salt, moisture, and mild chemicals.
They strictly comply with standard DIN 7991 and ISO 10642 specifications for countersunk head designs, ensuring universal compatibility and precise fitments.
The countersunk design allows the bolt head to sit completely flush with the panel surface. This eliminates protrusions, prevents airflow disruption/wind drag, and distributes clamping load evenly to protect thin materials from deformation.
The bolts come in a diameter range of M5–M8 and lengths of 10–25 mm. They feature metric coarse or fine threads with an ISO 6g external thread tolerance and an internal hex socket drive.
Yes, we support full OEM customization, including custom thread types, head styles, finishes (Natural, Polished, Anodized, PVD), lengths, and custom logo engraving.
Always start threading the bolt by hand to ensure the head aligns flush before applying tool torque. Ensure the mounting surfaces are deburred and flat. For outdoor panels, check the torque and surface status annually.




