Shenzhen Shi Shi Tong Metal Products Co., Ltd

  Why are there many people using black pan head self tapping screws? Pan head self-tapping screws are a type of screw fastener that many people use, and there are many people who use the self-tapping screws on the black surface. The screw that Mr. Hu needs is a  black  pan head  self tapping screws . Mr. Hu said that he wants to know what kind of  black pan head self tapping screws  we can use. The materials that Shishitong screw manufacturers can do are stainless steel, carbon steel, titanium, copper, and aluminum. The various materials to be made of black are stainless steel electrophoresis, stainless steel yttrium-plated zinc, carbon steel niobium, carbon steel niobium, carbon steel dacromet, titanium anodized black, aluminum anodized black, copper black.   Mr. Hu is not sure what material he is using. After we communicated with Mr. Hu, we recommended the use of titanium according to Mr. Hu’s usage scene. Because Mr. Hu’s  black pan head self ...

Many of Mr. Ma’s products use American-made threads. But recently, Mr. Ma received a  4-40 phillips pan head screw   delivered to him by Shi Shi Tong. Then, Mr. Ma told us that the size of the screws does not meet his assembly requirements. Why? During the actual assembly, Mr. Ma found that some of the threads could be screwed in, but some of the threads were screwed in and found to be small. After Mr. Ma gave us feedback, we told Mr. Ma whether it was possible to tell the thread diameter of the small screw that was found after the assembly. Mr. Ma told us that it is 2.70mm. In the drawings given by Mr. Ma, it is marked with #4-40-2A, and the diameter of this thread is converted into metric: 2.69-494mm-2.82448mm, 2.70mm is within this tolerance. Later, Mr. Ma told us that the proper thread diameter for assembly is 2.72mm-2.81mm. After Mr. Ma finished talking to us, we were aware that Mr. Ma might have given the wrong  4-40 phillips pan head screw , or the size of t...

few days ago, when turning things over, I found that the slotted head pan screw on one of the accessories was severely corroded. I needed to replace it with a new one. Why is the  slotted pan head screw  corroded? Generally speaking, it is necessary to look at the position where the slotted pan head screw is placed. If this position is frequently exposed to salt water, acid and alkali chemicals, the surface protective film of the screw will be damaged, and the screw will be corroded after the protective film is broken. So we will see what we see. How to avoid this situation? Before producing slotted pan head screw, you can tell the manufacturer how many hours of salt spray test it is to withstand. For example, a 500-hour salt spray test is required. It is generally passivated using stainless steel. Or use titanium screws, the screws produced by titanium are very resistant to corrosion. Secondly, the slotted pan head screws should be kept away from the places where they ...

We know that basically every industry uses screws. There are many industries that use long pan head screw . For example, the machinery industry, the electronics industry, the chemical industry, the construction industry, etc. all need screws. The Shi Shi Tong screw factory has just produced a  long pan head screw  for the customer. This  long pan head screw  is applied to the furniture. Its size is M6*800mm long. Specifically, the customer who assembled it did not explain it to us in detail. But if you also need any pan head screws, the Shi Shi Tong screw factory can be customized according to your needs. Welcome to ask! The customer also expressed satisfaction after using the screws we produced. We praised the size of the customer’s needs, the tolerances were strictly controlled, and the quality was very good! The Shi Shi Tong screw factory introduces professional equipment to produce infinitely long screws. As long as you need it, we can produce it! Welc...

Pan head self tapping screws can generally be made of stainless steel, carbon steel, titanium, aluminum, copper, brass. The most frequently used materials are carbon steel and stainless steel. Carbon steel pan head tapping screws are made of low carbon steel and have sufficient hardness for cutting or forming internal threads after heat treatment and surface hardening. Stainless steel self-tapping screws are generally made of 304HC, and some are made of 201, 316 stainless steel. Generally, the hardness required for cutting can be obtained after head and rolling thread. For carbon steel  pan head self tapping screws , the relationship between carburized depth, surface hardness, and core hardness is critical. If the carburized layer is too thin, the screwing effect of the screw is poor; if it is too thick, it will adversely affect its torsional strength and the toughness of the screw. The surface treatment of most carbon pan head self tapping screws is galvanized and n...