Feature●QTY 250 5/16" X 1" Hex Washer Head Self Drilling Tek Serrated Screw 7/16" Dr.●You receive 250 Pieces in one order●Need more precise measurements or a dimensional drawing? Write to us●(QTY 250) 5/16" X 1" Hex Washer Head Self Drilling Tek Serrated Screw 7/16" Dr.Description (QTY 250) 5/16" X 1" Hex Washer Head Self Drilling Tek Serrated Screw 7/16" Dr.