Gr5 Titanium Countersunk Head Bolts for Motorcycle and Bicycle - China Suppliers & Factory - High Strength & Corrosion Resistant
Key Features
Titanium countersunk head bolts sit perfectly flush, eliminating protrusions and preventing airflow disruption. This design ensures smooth aerodynamic performance and clean visual lines on exposed panels.
The thin countersunk head maintains firm clamping without adding height. Its geometry keeps panels from loosening under vibration and helps retain a clean, embedded appearance.
Recessed into the panel, the bolt head reduces wind drag and local surface turbulence. titanium countersunk head bolts maintain stability, flush installation, and seamless aesthetics for fairings and covers.
The 82°–90° countersunk angle distributes load evenly across thin panels and transparent housings, preventing stress concentrations and panel deformation, ideal for lightweight plastics or sheet metal.
The seated countersink area resists staining and edge wear during long-term outdoor use, keeping the contact surface smooth and preventing marks around the flush interface.
Installation & Maintenance Guidance
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When positioning the bolt, start threading it by hand so the countersunk head settles flush before applying full torque with tools.
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Check whether the panel holes and seating surfaces are flat and free of burrs; uneven edges will affect fit of the countersunk screws.
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For exterior mounting points, we recommend checking the torque and surface condition annually to keep the flush interface secure.
Technical Specifications
| 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) |
| 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) |
| 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
Motorcycle Panels & Covers
For flush installation on exterior motorcycle panels, titanium countersunk head bolts keep the surface level and reduce visible protrusion (M6 × 12–20 mm). This helps the fairings and side covers maintain smooth airflow and a consistent appearance across connected body sections.
These bolts secure wind deflectors and instrument housings while keeping the mounting surface flush to the panel. Their vibration resistance supports stable attachment at higher speeds (M6–M8 × 15–25 mm), and torque can be adjusted based on panel thickness.
Countersunk heads sit cleanly within dashboards and side covers, preventing snagging and keeping the panel surface visually tidy (M5–M6 × 10–20 mm). The load spreads evenly across thin sections, helping the panels hold shape during long-term use.
Bicycle Lightweight Panels & Accessories
Titanium countersunk head bolts provide a flush, secure fit for thin bicycle panels, guards, and transparent housings (M5 × 10–15 mm). They help reduce concentrated stress, preserve lightweight construction, and keep the edges and surfaces visually clean.
Frequently Asked Questions
What makes Grade 5 Titanium countersunk head bolts suitable for panels?
They combine high tensile strength (≥ 900 MPa) with lightweight properties and a flush-fitting design. This prevents airflow disruption and keeps panels securely clamped under high vibration without protruding.
What standards do these countersunk bolts comply with?
Our titanium countersunk head bolts comply with standard DIN 7991 and ISO 10642 specifications, ensuring precise head geometry and reliable internal hex socket drive compatibility.
How does the precision countersunk angle protect thin panels?
The 82°–90° countersunk angle is designed to distribute the clamping load evenly across the contact surface. This prevents local stress concentrations, panel deformation, and cracking in delicate materials like plastics or thin sheet metal.
What custom options are available for these bolts?
We support extensive OEM customization, including thread type, head style, finish, and length. Surface finishes include Natural Titanium, Polished, Anodized, and PVD Coating, along with optional logo engraving.
What is the recommended installation method to ensure a flush fit?
First, ensure the panel hole and seating surface are completely flat and free of burrs. Start threading the bolt by hand to align the head properly before using tools to apply the final torque.