BARP 6110750 5-Pack Of Stainless Steel 12-Point Bolts, Size 14-20, 0.750 Under Head Length ReviewbP PP ARP 6110750 5-Pack Of Stainless Steel 12-Point Bolts, Size 14-20, 0.750 Under Head Length PBolts have a diameter of 14", a standard thread pitch of 20, an under head length of 0.