Screw Washer

1.Product Introduction

Screw Washer, typically referring to screw-washer assemblies or combination screws with integrated washers, is a fastener that pre-assembles a screw and washer into a single unit. The washer is usually a flat washer, spring washer, or serrated washer, made from materials such as carbon steel, stainless steel, or copper, and can undergo various surface treatments including zinc plating or nickel plating. This product line is designed to streamline assembly processes, ensure proper pairing of washers with screws, and deliver consistent preload and anti-loosening performance.

2.Application

1. Electronic Devices and Precision Instruments: Used to secure internal components and prevent loosening due to vibration.
2. Industrial Machinery and Automation Equipment: Provides high-precision and stable connections in machine tools, transmission systems, and other equipment.
3. Automotive Manufacturing: Compliant with automotive quality management standards like IATF 16949, used for fastening engine, chassis, and other components.
4. Construction and Infrastructure: Applied in outdoor or vibration-prone environments like public facilities and lighting equipment, offering corrosion resistance and anti-loosening assurance.
5. Home Appliances and Furniture Assembly: Streamlines production processes while enhancing connection reliability.

3.Working Principle

The operating principle of a screw washer is based on its mechanical structure. The screw portion generates axial force through rotation, penetrating or screwing into the connected components. Pre-assembled washers (such as flat washers) positioned between the screw head and the surface of the connected component serve to distribute pressure and protect the surface. Spring washers or serrated washers, when tightened, utilize their elastic deformation or serrated locking structure to generate sustained radial tension or frictional resistance. This counteracts the loss of preload caused by factors like vibration and thermal expansion, thereby achieving a locking function. 

4.Advantages

• Enhanced Assembly Efficiency and Consistency: Pre-assembly eliminates the risk of on-site pairing errors, reduces assembly steps, and improves production line speed and consistency.
• Improved Anti-Loosening Reliability: Dedicated anti-loosening washers (such as spring washers and nylon lock washers) effectively resist vibration-induced loosening, ensuring long-term connection stability.
• ‌Reduce Costs and Inventory Management Complexity: Procured and managed as a single component, they minimize part variety, lowering procurement, warehousing, and logistics expenses.‌
• ‌Improve connection quality and surface protection: Washers distribute load evenly, preventing screw head damage to connected surfaces—ideal for securing precision or delicate materials.‌
• ‌Meet stringent certification standards: Premium products typically comply with quality management systems like ISO9001, ISO14001, and IATF16949, while adhering to environmental directives such as ROHS and REACH for demanding industries.‌

5.Technical Specifications

6.Our Solutions