Use appropriate measuring tools (such as calipers, vernier calipers, etc.) to measure the diameter, length, and other dimensions of bolts to ensure they meet the requirements.
Surface quality inspection: Check the quality of the bolt surface, including whether there are oxidation, rust, cracks, or other defects.
Forming inspection: Check whether the threads, head, and tail of the bolt are fully formed, whether the threads are clear, and whether the bolt head is damaged or notched.
Rated identification inspection: Check whether the identification on the bolt (such as brand number, batch number, specification, etc.) is clear and recognizable.