Lag screws longer than 12 inches will have a minimum thread length of 50% of the screw length up to a maximum of 8 inches

#23 Heavy Duty Jobber Drill Bit

1-8 x 7 Hex Cap Screw SS 316 (A4)

1-8 x 1 3/4 Hex Cap Screw SS 316 (A4)

3/4-10 x 7 1/2 Hex Cap Screw SS 18-8 (A2)

5/8-11 x 3 1/2 Hex Cap Screw SS 316 (A4) Flat Split Drive Anchors Zinc Plated - Clearance Lag screws longer than 125 8 11 x 3 1 2 Hex Cap Screw SS 316 (A4) . 316 series stainless steel differs from 18 8 by its molybdenum content (2 3%) and a higher nickel content (10 14%). 316 stainless steel has greater corrosion resistance than 18 8 as well as superior strength at high temperatures.