Combination Screws: From Hex Designs to Pan Head SEMS Fasteners
Understanding Combination Screws: Features, Benefits, and Applications
Combination screws, also known as screw-washer assemblies, are fastening components that combine a screw and washer into a single integrated unit. This design helps save time during installation, ensures consistent alignment, and improves load distribution.
Structure and Design
Unlike traditional screws that require separate washers, combination screws feature a pre-attached washer under the head. The washer can be flat, spring, or lock-type, depending on the application. The screw itself may have different head types, such as pan, hex, or socket, and can be made from materials like stainless steel, carbon steel, or alloy steel.
Main Advantages
- Faster Assembly: No need to place a washer manually—reducing assembly time.
- Consistent Performance: Washer remains in position, ensuring uniform pressure distribution.
- Cost Efficiency: Reduces the chance of losing washers during handling.
- Enhanced Reliability: Improves resistance to loosening due to vibration.
Common Applications
Combination screws are widely used in industries where speed, precision, and secure fastening are essential. Typical applications include:
- Electronics assembly
- Automotive manufacturing
- Appliance production
- Machinery and equipment
Material and Standard Options
These screws are available in multiple finishes—such as zinc plating, black oxide, and nickel plating—to provide corrosion resistance. Common standards include ISO, DIN, and ANSI specifications, ensuring compatibility with global manufacturing requirements.
Conclusion
Combination screws offer a practical and efficient solution for fastening needs. By integrating a washer into the screw design, they reduce installation time, minimize errors, and improve fastening reliability. For industries aiming to boost efficiency without compromising quality, combination screws are an excellent choice.
