TPI Wheel Bolts (10 pcs), Spherical Seat R13, 17mm Hex, M14×1.5, 45mm, Black

TPI M14x1.5 Locking Wheel Bolts are used to secure your car's wheels against theft. This model has an M14×1.5 thread, a length of 45mm and a ball seat R13, which is necessary for the correct seating on selected types of wheels. The bolts are made of high-grade steel and undergo a heat treatment process to increase their strength. The black chrome finish ensures long-term protection against corrosion and other external elements.

Material and Workmanship for High Reliability

The bolts are made from high-grade steel of ASTM 4140 or SCM 440 specification. This material undergoes a heat treatment process that increases its strength and toughness. Protection against corrosion and external elements is provided by a multi-layer surface treatment. This consists of zinc plating, followed by triple nickel plating and a final layer of black chrome. The reliability of each production batch is verified by salt spray testing and a tensile strength test to confirm the resistance of the surface and the strength of the material itself.