Drilled-head M8 × 1.25 flange bolt for a measured motorcycle assembly. This Tianswer fastener is listed in Grade 5 Ti-6Al-4V titanium alloy and offered from 15 to 90 mm. Head holes can be used only as part of a correctly specified and installed safety-wire system.
Specifications
Thread: M8 × 1.25 mm
Lengths: 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80 and 90 mm
Head diameter: 13.5 mm; head height: 6.5 mm
Listed weight: approximately 4.7–17.8 g per bolt, depending on length
Lengths up to 30 mm are listed as fully threaded; longer versions have approximately 30 mm of thread
Existing listing states 6 mm internal and 10 mm external drive dimensions; confirm physical tool fit
Colors: titanium, gold, rainbow, burn blue and black
Sold individually
Brake and lockwire checks
For caliper hardware, compare the original bolt's length, pitch, flange seat and thread coverage, and verify that this exact hardware is approved by the brake maker. Use its specified tightening and safety-wiring procedure. A drilled hole alone does not prevent loosening, and matching dimensions alone do not establish brake suitability. For an engineering teardown on fatigue resistance and shear analysis, read our guide on Rolled vs. Cut Threads & Shear Analysis.
FAQ
Can I use this for any motorcycle caliper? No. Confirm the specific caliper's approved fastener and installation requirements.
