Wedge Anchor Stud System of Measurement Metric Anchor Diameter 28 mm Thread Size M20 Overall Length 201 mm Thread Length Not Applicable Eyelet Hole Size Not Applicable Material Steel Material Grade/Class Class 8.8 Finish Zinc Plated Compatible Material Concrete Drill Bit Size 28 mm Minimum Installation Depth 150 mm Minimum Material Thickness 254 mm Ultimate Shear Strength (4 000 psi Concrete) 44 623 lb Ultimate Tension Strength (4 000 psi Concrete) 21 444 lb Nut Width 30 mm