Subframe Bolts

The Subframe Bolts secure the subframe to the vehicle body. They are among the high-strength fasteners used in the chassis system. We make them from SCM435 alloy steel. Our multi-station cold header forms the head and reduces the shank diameter in one operation. This process creates a consistent shank diameter. We then roll the threads. Our thread rolling dies undergo regular precision checks. We ensure that the go gauge passes smoothly on every Subframe Bolt. This helps ensure a proper fit during assembly.

Our control plan covers ten key characteristics. We monitor forming temperature and lubrication conditions throughout production. We take measures to prevent surface folds on the bolt. These folds can become starting points for fatigue cracks. Our eddy current inspection equipment detects surface defects at high speed. Every Subframe Bolt goes through this inspection. We automatically reject any defective pieces. This process helps maintain product quality and reliability for critical chassis applications.

Our factory is only 80 kilometers from Ningbo Port. This location gives us convenient logistics options and helps us arrange timely shipments. We are familiar with export declaration procedures and provide all required customs clearance documents. We ship our Subframe Bolts to ports worldwide. Our packaging can withstand stacking up to two meters high. We design the packaging to provide protection during container transport. We welcome your technical questions and aim to be your trusted fastener supplier.