Description
1 4 20 x 4 Phillips Flat Machine Screw Type F Zinc Plated 1 14 Grade 8 Hex Cap Screws Yellow Zinc Plated Typical hardness on diameters 1 4 Typical hardness on diameters 1 4 to 1 inch is HRC 25 34 The Spike® anchor is formed with an "s" shaped configuration at the working end of the anchor to create an expansion mechanism