The SPARTS A3 Series button head M5 D12 titanium bolt is designed for motorcycle and electric vehicle modification and precision assembly, with a focus on fastening accuracy, material stability, and long-term reliability.
Rather than being a purely cosmetic upgrade, this bolt emphasizes manufacturing quality and material performance, delivering a dependable fastening solution for demanding applications.
650°C Hot Forging · Precision-Controlled Head Design
The bolt head is formed using a 650°C high-temperature forging process and finished with a custom S-PARTS logo stamping mold.
Each stamping mold is used no more than 300 times
Ensures consistent tool slot precision and structural strength
Maintains stability under repeated installation and higher torque conditions
S-Grade TC4 Titanium Alloy · Strength with Corrosion Resistance
Manufactured from S-PARTS S-Grade TC4 titanium alloy (Ti-6Al-4V):
High strength with excellent corrosion resistance
Difficult to machine, requiring strict process control
Commonly used in aerospace applications and F1 / MotoGP-level engineering
Provides a fastening solution that remains reliable and confident in demanding environments.
