The Hillman Group 220145 Grade 8 Hex Cap Screw, 3/8-Inch X 3-Inch, 50-Pack

A Common Feature On A Hex Cap Screw Is A Washer Surface Directly Under The Head Which Creates A Better Seal | An Alternative For Using Them Without Nuts Is To Install Them Directly Into A Compatible Internally Threaded Hole | Grade 8 Screw | From The Brand Name: The Hillman Group