Serrated Hex Washer - Unslotted - Type AB - Self Tapping Screws - 7/16" A.F.
Across the Flats: 0.437 - 0.428" Head Height: 0.190 - 0.172"
Manufactured to ASME B18.6.3 & SAE J933 specifications
Case Hardened to Rockwell C45 min (Core Hardness: Rockwell C28-38)
Fully Threaded / Steel Zinc Plated
Technical Specifications / 2D 
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