2.1 & ASTM A307A. The hex head allows for lag screws to be tightened with more torque than can be used on phillips head screws, though a pilot hole is still required prior to installation.)Requires pilot hole to be drilled and installs using wrench or socket toolThread Type: Deep, Point Style: GimletSpecification(s) Met: ASME B18.
46 mm, Drill Bit Point Angle 140 Degrees , Carbide, Coolant Through, Cutting Direction Right Hand, Decimal Equivalent 0.Screw Machine Drill Bit, Drill Bit Size 4.1756.
4882.40 mm, Drill Bit Point Angle 140 Degrees , Carbide, Non-Coolant Through, Cutting Direction Right Hand, Decimal Equivalent 0.Screw Machine Drill Bit, Drill Bit Size 12.