Split Lock Washer 1/2", Zinc

The LW-12-Z is a general purpose washer. It is made from zinc-plated steel and is corrosion resistant. As a screw is tightened, these washers flatten to add tension to the joint and prevent loosening from small amounts of vibration. 
Spcifications:

• ID: 0.500"
  
• OD: 0.125"
  
• Material: Zinc-Plated Steel
  
• Weight: 0.0007