An expansion screw, also known as an anchor screw or expansion bolt, is a type of screw designed for applications where a secure and reliable fastening is needed. It is commonly used in construction, carpentry, and other industries.

The expansion screw features a plastic head, which is typically made from materials such as polypropylene (PP), polycarbonate (PC), or polystyrene (PS). The plastic head provides resistance to corrosion and insulation properties, making it suitable for various environments.

The material of the screw itself can vary depending on the specific application. In some cases, the entire screw, including the screw shaft, may be made of plastic material for specialized purposes, such as in corrosive environments.

Screw Material

The materials used by Hsin Yu Industries for manufacturing screws include stainless steel and carbon steel. The steel material options are:

• Stainless Steel: 304, 305, 316, 410, 430
• Carbon Steel: 1018, 1022, 10B21, 35ACR, 45ACR, 8.8 grade fasteners

Hsin Yu offers customization options for expansion screws:

• Adjustable fastener design, including thread type and head type
• Grooving options, such as straight grooves, cross-cut grooves, burr-free grooves, or head-forming grooves
• Achievable defect rate within 50PPM through quality control and screening machines
• Customization options tailored to specific requirements.