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Mining / Hard Rock                                                   

NOTE THE WEAR PATTERNS ON THE LOWER SCREW. ABRASIVE MATERIALS HAVE REMOVED THE PAINT AND WORN DOWN THE SCREW FLIGHT THICKNESS AND FLIGHT O.D.

A SCREW IN THIS APPLICATION WOULD BE BETTER SUITED FOR THIS TYPE OF ABRASIVE ENVIRONMENT IF THEY WERE EQUIPPED WITH GOODMAN WELD-ON HARDCOATING AS SHOWN BELOW. 

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