Stainless 5/16 x 5" Hex Lag Screw (1" To 5" Lengths Available in Listing), 18-8 Stainless Steel, 25 pieces (5/16 x 5") 300 Series Stainless Steel, (18-8) Tensile - 100,000 psi to 125,000 psi, Hardness - 85 Rockwell B 5/16 x 5" Hex Head Lag Screw (also known as lag bolt) Great corrosion resistance for outside applications 25 Pieces