Why are stainless steel nuts designed as hexagons?

As we all know, nuts are used to fasten parts. Parts that are screwed together with bolts or screws for fastening are a must-have component for all manufacturing machinery. According to different materials, they are divided into several types such as carbon steel, stainless steel, and non-ferrous metals (such as copper). Then follow Jiangxin Fasteners to learn about stainless steel hexagonal nuts!

I have heard from customers that sometimes when using stainless steel flat head screws, they are a bit difficult to turn, and even locked. Have you ever thought about the specific reasons? Let's take a look at it with Jiangxin Standard Parts!

1: The thread matching angle is wrong. The matching between stainless steel flat head screws and nuts is a clearance match. They have their own standards and tolerances. Therefore, if they are not designed well, the middle axis may not be on the same line during assembly. They will tilt during assembly, and the deflection angle is large. The smaller the contact and force area between the threads, the more likely the threads will be damaged, resulting in locking.

2: Stainless steel is soft and easy to stick. When the screw is tightened, it rubs and falls out of stainless steel debris. Since the stainless steel material is not hardened, it may stick to the internal thread instead of falling out, causing the screw to lock in the internal thread.

3: Stainless steel has low thermal conductivity. When screws and nuts are assembled, frictional heat will also occur, but the thermal conductivity of stainless steel is relatively low. When the pressure and heat generated destroy the oxide layer, it will directly block the tooth pattern and cause locking.

Screws and nuts work together to achieve the tightening effect. The position and size of the assembly are often limited by space, that is, the assembly space is very small. In the case of insufficient space, use a wrench to tighten the nut. Obviously, the smaller the angle of a single rotation, the better. Assuming that the nut has n sides, the angle of each wrench rotation is degrees, so the number of sides increases and the rotation angle decreases, which is conducive to operation. But in practice, blindly increasing the number of sides will reduce the contact area between the wrench and the nut, which will make it easier to slip. After learning from experience, predecessors often choose hexagonal nuts that are easy to operate (only 60 degrees at a time compared to 90 degrees for four corners) and not easy to slip.

The truly high-standard hexagonal stainless steel nuts are striving for excellence in all details, and strive to be unique if they cannot be the first. The design and development of the hexagonal head alone are full of technicality. If it is a standard hexagonal stainless steel nut, there is still the experience of predecessors as a reference. However, when customers require non-standard specifications, how can a screw and nut manufacturer take it lightly? It is bound to require R&D personnel to brainstorm, communicate with customers in a timely manner, and use 100% sincerity to make very satisfactory non-standard products. In the production process of hexagonal stainless steel nuts, in addition to paying special attention to the design of the head