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141007KWSMS , Serrated Hex Washer Unslotted Self Drilling Screws

Self Drilling Screws with Machine 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 1/4-20 x 5/8 in
Ctn Qty 3000
Weight Lbs/M 11.23
Plating Steel Zinc
Number of Points 2
Core Hardness Rockwell C32-40