Spring Washer Black

Product Introduction

• Standard Name: Spring Lock Washer (Black Oxide).

• Common Names: Black Spring Washer, Black Lock Washer, Blackened Spring Washer.

• Product Definition: A single-coil spiral spring washer made of carbon steel or stainless steel, featuring a black oxide surface treatment. Its principle relies on the washer's inherent elastic deformation to generate sustained preload, preventing bolt-nut loosening due to vibration. The black oxide coating simultaneously provides basic rust protection and aesthetic appeal.

Spring Washer Black Key Features

• Black Oxide Finish: Provides basic rust prevention, abrasion resistance, and lubrication protection.

  The matte black finish reduces light reflection and is suitable for moderately corrosive environments.

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

  providing continuous axial pressure and resisting vibration-induced loosening.

• Material 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 fitting.

• Advantages: Reliable anti-loosening, economical and practical, low-profile appearance, 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 generates 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

  black oxide layer reduces friction and provides mild corrosion protection.

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

  deformation and frictional grip.

Product Applications

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

  resisting vibration loosening.

• Automotive Industry: Assembles engines, chassis, or suspensions; the black coating reduces glare.

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

• Electronics and Electrical Appliances: Connects housings or brackets; low reflection suitable for

  precision equipment.

• Industrial equipment: production lines or heavy machinery, as standard anti-loosening accessories.