Self-tapping screws have a wide range of tip and thread patterns, and are available with almost any possible screw head design.
While other screws and bolts require holes with threads, tapping screws create their own threads.
Pointed screws are the most common tapping screw. They have a pointed end to penetrate thin material such as sheet metal, and soft material such as wood and drywall. In thicker material, they generally need a starter hole.
Thread-forming and thread-cutting screws create reusable threads in metals and plastics. They require a drilled or punched hole to install. Thread-forming screws press threads into material for a tight, vibration resistant assembly, while thread-cutting screws require less driving torque and cause less stress on material than thread-forming screws.
Drilling screws save you time and effort by drilling their own holes, creating reusable threads, and fastening material in a single operation.
If the products have some quality problem,how will you deal with it?
A: Each step of production and finished products will be inspected by QC department before shipping.If the quality problem of products caused by us, we will provide a replacement service.
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