Thread rolling board-two square stencils used on the thread rolling machine, which are divided into two pieces, one long and one short, with thread patterns on it. It is used to squeeze the screw nail into a thread mold.The thread rolling board is the most commonly used thread tool for processing screws and bolts in the standard fastener industry. The processing principle mainly adopts cold extrusion molding, and cold extrusion molding has high production efficiency, low processing cost, and processed thread accuracy and strength. The advantages of high quality and good surface quality have been widely used.

What is the reason for the failure of the thread rolling board? The most common failure modes of the thread rolling board mainly include: fatigue damage, abrasion, chipping, pile of teeth, spalling of teeth, etc. The failure mode of the thread rolling board is mainly caused by cold working, hot working and improper use by users. The thread is buckled in disorder, mainly because the helix is not straight, and the thread rolling board has an axial displacement during manufacturing. Tooth shape peeling, dislocation occurs when rolling thread, resulting in tooth shape clamping skin and double cusp

There are many types of hardware fastener manufacturing materials. Among them, stainless steel fasteners are more textured in appearance, have better performance in strength, and have the advantages of corrosion resistance, easy manufacturing, and good welding. Fasteners made of stainless steel can be electroplated or heat-treated to achieve better performance, and at the same time, they can be 100% recycled.

Because the specifications, dimensions, tolerances, weight, performance, surface conditions, marking methods of each specific fastener production port, as well as the specific requirements for acceptance inspection, marking and packaging, are specified in several national (industry) standards. Medium, such as the metric system, the German system, and the imperial system. Fasteners are the most widely used mechanical basic parts. With my country's accession to the WTO in 2001, it has entered the ranks of major international trading nations.

"Drilling self-tapping screws" are also called "drilling screws", "drilling screws" and "self-drilling screws", also known as "dovetail screws" by northerners. This kind of screw has a drilled tip, and the tip is like a twist drill. During assembly, the screw can drill the center hole by itself, and then tap the adjacent thread part to squeeze out the matching hole in the hole on the carrier. Thread, so it is called self-drilling and self-tapping screw.The self-drilling screw is a new invention in recent years. Screws are a common term for fasteners, a daily spoken word.

Self-tapping screws are more advanced than ordinary screws. The drilling of self-tapping screws does not require tapping holes. The screws used are different from the general ones. The heads are pointed and the pitch is relatively large. Like, it can be screwed in directly without tapping. This method is usually used for metals and plastics. There are many types of self-tapping screws, but they all have the same characteristics, and there are five main characteristics.