Parts work best with large head screws such as round, pan, binding, and washer-head screws
Teeth used for locking & tension
Included variants run from #4 to 1/2" in screw size
Full assortment includes both internal and external variants
Stainless steel finish for best-in-class corrosion resistance.These stainless steel external toothed lock washers feature a 5/16" screw size.50 pieces per retail package
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External tooth lock washers have serrations around the outer diameter, which provide better holding power due to a greater surface area. They provide maximum torsionsal resistance and prevent loosening from vibration and/or corrosion. External tooth lock washers work best with large head screws such as: round, pan, binding, or washer head screws.