5/16" Titanium Bolt

Imperial 5/16"-18 UNC titanium wheel assembly bolts precision-machined from Grade 5 Ti-6Al-4V (TC4) for modular multi-piece split-rim wheels, American motorsport hubs, and custom Harley-Davidson builds. Designed for 2-piece and 3-piece wheel rebuilding where imperial hardware is required, our 5/16" titanium bolts feature rolled 18 TPI coarse threads delivering over 950 MPa tensile strength while shedding 45% of rotating unsprung mass. Featuring an external 14.4mm 12-point bi-hex flange driven by an 8mm 12-point socket, these bolts handle high torque without slipping.

Key 5/16"-18 Specifications

  • Thread Size & Pitch: 5/16"-18 UNC (Coarse thread, 1.411mm pitch).
  • Available Lengths: 1.0 inch (25.4mm) and 1.125 inch (28.58mm) under-head lengths.
  • Head Design: 14.4mm integrated bi-hex flange head driven with an 8mm 12-point socket.
  • Corrosion Resistance: 100% immune to road salt and acidic wheel cleaners, preventing rust streaks on polished modular rim lips.

Related Fasteners & Technical Guides

Rebuilding metric wheels? View our M7 BBS Wheel Bolts and M8 Modular Wheel Hardware. Learn about torque specifications in our Wet vs. Dry Torque on Titanium Fasteners Whitepaper.

Frequently Asked Questions

Are these 5/16"-18 bolts for lug mounting or split-rim assembly?

These are perimeter assembly bolts engineered specifically to clamp the wheel barrel, face, and lip of modular multi-piece wheels together. They are not lug bolts.

What is the recommended assembly torque for 5/16" wheel bolts?

Recommended assembly torque with medium-strength threadlocker is 18–22 N·m (13–16 lb-ft). Always torque in a star/crisscross sequence in two stages.

Will these bolts corrode or stain polished aluminum wheel lips?

No. Grade 5 titanium does not rust or flake like chrome-plated steel, keeping your custom wheel barrels and lips pristine.