Unslotted - Hex Washer - Serrated - Self Piercing Screws - 1,000 Hour Salt Spray
High Corrosion Resistance
1/4" Across Flats of Hex
Full Thread
Measurable: Case Hardened to Rockwell C45 min.
Measurable: Core Hardness: Rockwell C28-33
Technical Specifications / 2D 
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