4TRADE Bolt & Nut M10 x 130 Din Cup Square Hexagon Bright Zinc Plated PK5
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This bolt has a square shoulder under a rounded head (Mushroom Head) which resists turning when the nut is tightened or removed. The bolt is driven into a hole the same size as the shank and then hammered the rest of the way, where the square shoulder locks firmly into place.
Use when ever a smooth finish surface is required
Zinc plated, reducing the corrosion rate in normal atmoshere