TPI Wheel Bolts (10pcs), Conical Seat, 17mm Hex, M14×1.25, 40mm, Black
TPI Wheel Bolts (10pcs), Conical Seat, 17mm Hex, M14×1.25, 40mm, Black
TPI locking wheel bolts secure your car's wheels. They are made from chrome-vanadium or chrome-molybdenum steel, which is heat-treated to achieve consistent hardness and strength. The bolts have an M14 × 1.25 thread and a 60° conical seat. The black chrome finish protects them from corrosion and matches the look of dark wheels.
Key features of the TPI M14 × 1.25, 40 mm locking bolts
- Designed for wheels with a 60° conical seat
- Made of ASTM 4140 / SCM 440 steel (Cr-V or Cr-Mo)
- Black chrome finish for corrosion protection
- Heat-treated for consistent hardness and strength
- Salt spray and tensile strength tested
- M14 × 1.25 thread
- Thread length of 40mm
- Wrench size of 17mm
Construction and material quality
These bolts are based on high-grade steel, specifically chrome-vanadium or chrome-molybdenum (ASTM 4140 / SCM 440). The material undergoes a heat treatment process that ensures consistent hardness and strength along the entire length of the bolt. Each production batch is subjected to tests, including a salt spray test to verify corrosion resistance and a tensile test to check its strength. As a result, TPI bolts exceed the standards typically required for original equipment manufacturer (OEM) parts.
Specifications
Features
Specifications can be changed without notice. Images are for illustrative purposes only.
