Serrated - Hex Washer - Slotted - Zinc
Self Drilling Screws with Machine Screw Thread
Heads to ASME B18.6.3 / Screws Hardened to SAE J78 specifications
Case Hardened to Rockwell C50-56 (Core Hardness: Rockwell C32-40)
Steel Zinc Plated
Technical Specifications / 2D 
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