Titanium Bolt M8x10 15 20 25 30 35 40 45 50 55 60 65 70mm Drilled Hex Head Flange Bolts for car hub Motorcycle, Pitch 1.25mm, by Tianswer

Track-engineered Grade 5 Ti-6Al-4V titanium M8 hex flange bolts featuring pre-drilled safety wire holes for competitive motorsport, motorcycle brake calipers, and performance automotive hubs.

Pre-Drilled Safety Wire Lock Design

Designed to comply with rigorous motorsport and FIM/AMA road-racing scrutineering regulations, the hex head features precision cross-drilled holes through the flats. This enables fast, secure installation of stainless safety lockwire (0.025\"–0.032\" / 0.6–0.8mm) to mechanically prevent fastener loosening under violent high-frequency vibration, thermal cycling, and aggressive chassis flex.

16mm Integrated Flange & Partial Shank Architecture

The integral 16mm diameter flange distributes clamping preload evenly over aluminum and composite mounting surfaces, eliminating localized galling, surface gouging, and the need for separate washers. For lengths 30mm and under, the bolt is fully threaded. For lengths exceeding 30mm, the bolt incorporates a smooth, unthreaded shank with a standardized 30mm thread engagement. This unthreaded shank aligns with critical shear planes, maximizing shear fatigue resistance and structural rigidity in high-load suspension and hub assemblies.

Key Applications

• Race Motorcycle Caliper Mounts: Radial and axial front/rear brake caliper mounting bolts requiring lockwire compliance.
• Automotive Hubs & Wheel Spacers: Hub assemblies, rotor hats, brake duct brackets, and lightweight race car chassis mounts.
• Triple Trees & Chassis: Fork pinch bolts, steering stem hardware, rear shock linkage pivots, and subframe mounts.

Specifications & Dimensions

Material: Certified Aerospace Ti-6Al-4V (TC4) Titanium Alloy, Grade 5
Thread Size: M8
Thread Pitch: 1.25mm (Standard Metric Coarse)
Flange Head Diameter: 16.0mm
Flange Head Height: 6.0mm
Wrench / Socket Size: 12mm Hex Drive
Pre-Drilled Feature: Cross-drilled hex head for lockwire / safety wire
Available Lengths: 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm
Threading Profile: Full thread (≤ 30mm length); Partial thread with ~30mm thread length (> 30mm length)
Available Finishes: Natural Titanium, PVD Vacuum-Coated Gold, Rainbow, Burn Blue, PVD Deep Black

Installation & Torque Guidelines

Ensure female threads are clean and free from old debris. Apply a thin film of anti-seize paste (or medium-strength threadlocker if lockwire is omitted) to the engagement threads to prevent galling. Tighten using a calibrated 12mm 6-point socket to 22–25 N·m (always cross-reference your vehicle manufacturer's specific torque specification). For in-depth insights into fastener shank dynamics and shear stress, read our Rolled vs. Cut Threads & Shear Analysis.

Price is for 1 bolt.