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

1/4 x 2 Round Split Drive Anchor Zinc Plated (100)

1-14 x 4 Grade 5 Hex Cap Screw Zinc Plated

Typical hardness will range from HRB 69-100 and a minimum tensile strength of 60

1-8 x 2 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

5/16 x 7 Square Pan Gutter Screw White (10) 1/2 Hex Lag Screws 18-8 Stainless Steel Tensile strength (not pull out)5 16 x 7 Square Pan Gutter Screw White (10) . GutterScrew enables you to replace old popping gutter spikes once and for all. Over sized threads are wider than gutter spikes, so they fill old worn spike holes tightly. No water gets into your house. This heavy duty fastener provides unmatched holding power even in old spike holes. Over sized thread diameter tightly fills the existing spike holes for better holding strength and a watertight fit #3 square