9-10X2 1/2 6 Lobe Flat Nib Coarse Thread Type17 Exterior screw Part Thread 18 8 Stainless Steel (Pack Qty 1,500) BC-0940DTF17188

The deeper thread design offers greater resistance to pull-out forces. The six-lobe recess transmits drive torque with less required downward pressure 18-8 Stainless