Tensile strength (not pull out) will meet a minimum of 60

6 x 1 5/8 Phillips Bugle Decking Screws Dacrotized - Carton (5000)

3 USS Flat Washer Zinc Plated

5/8-11 x 1 1/8 Socket Cap Screw Alloy

They are available in high strength

M24-3.0 x 110 Hex Cap Screw 8.8 DIN 931 Zinc Plated Square Bugle-Head Self Drilling Screws 410 Stainless Steel Tensile strength (not pull out)M24 3. 0 x 110 Hex Cap Screw 8. 8 DIN 931 Zinc Plated Class 8. 8 Hex Cap Screws are manufactured from medium carbon steel, quenched and tempered. These are premium quality, medium strength fasteners with partially threaded shanks conforming to DIN 931.