Domestic screw plug specifications standard size
We need to use various types of screw products in our daily life. There are many kinds of screws, and the screw plug is still relatively common. What is the national standard size of the screw plug? Let's find out.
1. What is a screw plug
The outside of the screw of the screw plug is round, and the middle is a concave hexagon. Hexagonal screws are common screws with hexagons. The inner screwdriver looks like an "L". A Plug wrench is to cut two ends of a hexagonal steel bar and bend it at 90 degrees.
two. National standard size of screw plug
1. Because of the many specifications of screws, the standard sizes are also different. If you choose m4 plugs, the pitch is 0.7mm and the diameter is between 0.7mm.
2. If the m5 model is selected, the pitch is 0.8mm and the diameter is between 8.3-8.5. M6 screws, pitch 1mm, diameter ranging from 9.8-10mm. In addition, there are m8, m10, m14, m16, all the way to m42, various specifications, so the diameter and pitch are not equal.
three. Use a screw
Screw plugs are often used in machinery. The main advantages are that they are easy to fasten and disassemble, and are not easy to slip. Generally, the Allen wrench is a 90-degree bend, one end of the bend is long and one side is short. When using the short side to drive the screw, holding the long side can save a lot of strength, and it is better to tighten the screw. The long end has a round head (hexagonal cylinder similar to a sphere) and a flat head. Parts that are convenient to put down the wrench. The outer hexagon is much less expensive to manufacture than the inner hexagon. Its advantage is that the screw head (the force position of the wrench) is thinner than the inner hexagon, and the inner hexagon cannot be replaced in some places. In addition, machines with low cost, low power density, and low precision requirements use far fewer plugs than external hex.
