M12x1.25 Locking Conical Seat Wheel Lug Bolts

The machining of M12x1.25 Locking Conical Seat Wheel Lug Bolts is a process that involving several precision operations.
Drawing Wire
It is rooted in high-quality steel, which is converted into steel wire of the desired diameter through a precision wire drawing process and foundational for subsequent production stages.
Wire Heat Treatment
The steel wire undergoes heat treatment to boost its rigidity and ductility, in pursuit of the mechanical properties.
Head Punching
The heat-treated steel wire is stamped into the head shape of the bolt.make uses of advanced stamping technology to make the accuracy and consistency of each piece of bolt head.
Screw Drilling
After the head is formed, thread drilling is performed. By uses high-precision drilling equipment to make sure that the depth and spacing of the threads meet the standard requirements of M12x1.25.
Rolling Thread
The shape and size of the thread are further refined through the thread rolling process. It will increases the strength, durability of the threads and upgrades the productions attribute.
Heat Treatment
The bolts are heat treated again after rolling the threads to eliminate the internal stress generated during the machining process and further improve the properties of the material.
Surface Treatment
Junwei performs surface treatment on wheel bolts, such as galvanized or chromium-plated, to improve corrosion resistance and aesthetics.
Testing
Each batch of Junwei locking lug bolts will undergo strict quality testing, including hardness test, torque test and fatigue test, to ensure that the product meets international standards.
Quality Inspection
Before packaging, the final quality inspection is carried out to confirm that bolt meets the high standard of the company.
Packing
Qualified hub bolts are conscientiously packed to avoid damage during transportation.
Shipment
At the end, It will be sent to customers around the world.