which allows for a better range of fits to cut down on the potential for stripping

Typical hardness on diameters 1/4 to 2 1/2 inches is HRC 33-39

3/8-16 x 1 1/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (800)

1/4-20 x 1 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (2200)

including anchor bolts

5/8 x 6 DeWALT Engineered by Powers SCREW-BOLT+™ High Performance Screw Anchor Mechanically Galvanized (25) 5/8 Dowel Pins Alloy Steel which allows for a betterThe 5 8 x 6 DeWALT Engineered by Powers SCREW BOLT+ High Performance Screw Anchor Mechanically Galvanized (25) is the perfect anchor solution for heavy duty projects. Constructed of heat treated steel, this anchor is built to last and can support up to 1,500 lbs. of tension and shear force. Galvanization adds protection in demanding environments.