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311607KWS4 , #4 Paint Serrated Hex Washer Unslotted Self Drilling Screws

Self Drilling Screws with Self tapping screw threads
Heads to ASME B18.6.4 / Screws hardened to SAE J78 specifications
Case Hardened to Rockwell C50-56 (Core Hardness: Rockwell C32-40)
Steel Zinc Plated
Products specifications
Size 5/16-12 x 1 in
Ctn Qty 1200
Weight Lbs/M 26.00
Plating Steel Zinc
Number of Points 4
Core Hardness Rockwell C32-40