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Steel - Screws - SEMS Machine Screws - Split Lock Washer Sems

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Locking Serrations keep a tight grip when loosening forces are present. Flanged Head provides greater bearing surface and eliminates need for a washer.  Available in carbon steel with a zinc, black oxide and green zinc (grounding screw) finish, Grade 5 steel with zinc finish, and also  Stainless steel 18-8.