Hand Twisted Bolt

Hand tightened bolts are fasteners designed for manual operation, typically installed and removed without the need for tools. The characteristic of this type of screw is that its head has a rolled or butterfly design, which increases friction and makes hand tightening more convenient and efficient.
The application of hand twisted bolts is very extensive, including but not limited to medical equipment, wind power industry, aerospace industry, office equipment, petrochemical industry, electronics industry, communication industry, and shipbuilding industry. These application fields have different performance requirements for screws, but hand tightened bolts are widely used due to their insulation, non-magnetic, corrosion-resistant, and rust free properties.
In terms of materials, hand tightened bolts can be made from various materials such as stainless steel, modified engineering plastics, etc. Among them, nylon screws with added glass fiber have much better mechanical properties than ordinary nylon.