You may use screws in many places in your life, but how much do you know about some common sense of furniture screws? Taifeng Hardware tells you.
First, about electroplating
Most of the furniture screws produced by Taifeng Hardware need electroplating. The main purpose is to resist corrosion and rust. The non-plating is also blackened, mainly for rust prevention. the furniture screws are Divided mostly into iron and stainless steel after manufactured Common plating: blue zinc, white zinc, color zinc, environmentally friendly galvanizing, nickel plating, black zinc, black coating, etc.;
Second, about wire
Generally, the wires of furniture screws are divided into carbon steel and stainless steel, and carbon steel is divided into three types: low carbon steel, medium carbon steel and high carbon steel. Taifeng hardware furniture screws and wires have 1010A, 1018, 10B21, 45 steel and so on. Stainless steel is SUS201, stainless steel SUS304, stainless steel SUS776, stainless steel SUS316, stainless steel SUS404, and the like.
Third, about the hardness level
The screw/bolt hardness grade can be divided into: 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, etc. More than 10 grades, of which 8.8 and above screws or bolts are made of low carbon alloy steel or medium carbon steel. And after heat treatment (quenching, tempering), commonly known as high-strength screws / bolts, and the furniture screws produced by Taifeng Hardware are often rated 4.8/6.8/8.8