Spring Washer ZP

Product Introduction

• Standard Name: Spring Lock Washer (Zinc Plated).

• Common Names: Zinc-Plated Spring Washer, Zinc-Plated Lock Washer, ZP Spring Washer.

• Product Definition: A single-coil spiral locking washer manufactured from spring steel with a surface treated by electrogalvanizing or mechanical zinc plating (ZP). Its principle involves utilizing inherent elastic deformation to generate sustained tension, compensating for loosening in bolted connections caused by vibration, impact, or thermal expansion/contraction. The zinc coating provides fundamental rust protection.

Spring Washer ZP Key Features

• Zinc Plated (ZP) Coating: Provides basic rust protection and a bright silver finish, enhancing corrosion

  resistance, suitable for indoor or mildly humid environments.

• Split Spring Design: A ring-shaped split structure generates elastic restoring force upon compression,

  providing continuous axial pressure and resisting vibration-induced loosening.

• Materials and Strength: Commonly made of carbon steel or alloy steel, with high elasticity; conforms to

  standards such as DIN 127 and ASME B18.21.1.

• Various specifications: Inner diameter M3-M48 (or #4-2"), standard thickness, commonly used for

  bolt/nut fittings.

• Advantages: Reliable anti-loosening, economical and practical, aesthetically pleasing and shiny, but

  not suitable for highly corrosive environments.

Working Principle

• Compression Installation: Placed under the nut, the washer is compressed when tightened, and the

  split end undergoes elastic deformation.

• Restoring Force Generation: The elastic restoring force provides continuous spring force, maintaining

  the clamping force.

• Vibration Resistance: Under vibration, the restoring force prevents the nut from rotating backward;

  the zinc coating reduces friction and provides mild corrosion protection.

• Load Distribution: Evenly transmits pressure, preventing loosening; the principle involves elastic

  deformation and frictional gripping.

Product Applications

• Machinery Manufacturing: Secures machine tools, pumps, valves, or equipment components,

  resisting vibration loosening.

• Automotive Industry: Assembles engines, chassis, or suspensions; zinc plating is suitable for

  indoor environments.

• Construction Engineering: Secures steel structures or pipes, providing reliable anti-loosening.

• Electronics and Electrical Appliances: Connects housings or brackets, aesthetically pleasing and practical.

• Industrial Equipment: Production lines or heavy machinery, as a standard anti-loosening accessory.