Typical hardness on diameters of 1/4 to 1 inch is HRC 25-34

1-8 x 7 Grade 5 Hex Cap Screw Zinc Plated

This anchor is not recommended for applications overhead

including the attachment of gypsum board to metal studs

3/4-10 x 2 3/4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (20) 5/8-11 Flat Socket Cap Screws 18-8 Stainless Steel Typical hardness on diameters of3 4 10 x 2 3 4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (20) . L9 High Tensile Strength Hex Cap Screws are designed for use in high stress, severe service environments. The highest mechanical strength off the shelf fastening system available, its special features control torque tension characteristics to develop high clamp loads when using properly controlled tightening methods. Brighton Best manufactures L9 bolting from AISI alloy steels. L9