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High-Strength Gr5 Titanium Countersunk Head Bolts for Motorcycle & Bicycle - China Factory Suppliers
Key Features
Flush Fit
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.
Stable Countersunk Clamping
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.
Embedded Head
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.
Precision Countersink
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.
Protected Seating Edge
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
- 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
Motorcycle Panels & Covers
Fairings, Side Panels & Body 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.
Wind Deflectors & Instrument Housings
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.
Side Covers & Dash Panels
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
Enclosures, Guards & Display Mounts
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 (FAQ)
Q1: Why should I choose titanium countersunk head bolts over standard protruding bolts?
Titanium countersunk head bolts sit perfectly flush with the surface. This eliminates protrusions, prevents airflow disruption for better aerodynamics, reduces wind drag, and provides a clean, seamless aesthetic.
Q2: What standards do these countersunk head bolts comply with?
These bolts comply with DIN 7991 and ISO 10642 standards for countersunk head fasteners.
Q3: What is the countersunk angle of the bolt head, and why does it matter?
The countersunk angle is 82°–90°. This precision angle distributes the clamping load evenly across thin panels and transparent housings, preventing stress concentrations and panel deformation.
Q4: What grade of titanium is used, and what are its mechanical properties?
The bolts are made from Grade 5 Titanium (Ti-6Al-4V). It features a density of 4.43 g/cm³, tensile strength of ≥ 900 MPa, yield strength of ≥ 830 MPa, hardness of 34–36 HRC, and excellent corrosion resistance.
Q5: How should these bolts be installed and maintained?
Start threading the bolts by hand to ensure they settle flush before tightening with tools. Ensure mating surfaces are flat and free of burrs. For exterior mountings, check the torque and surface condition annually.
Q6: Can I customize the surface finish and dimensions?
Yes. Customization options include finishes like Natural Titanium, Polished, Anodized, or PVD Coating. OEM customization supports custom thread types, head styles, lengths, and logo engraving.