Carriage Bolt, Inch, Neck Type Square, Basic Material Stainless Steel, Material Grade 18-8, Fastener Finish Plain, Dia. /Thread Size 3/8 In. -16, Fastener Length 2 1/2 in, Fastener Thread Direction Right Hand, Fastener Thread Type UNC (Coarse), ANSI/ASME B 18.5, RoHS Compliant, Drill Size 25/64 in, Head Dia. 0.782 in to 0.844 in, Head Height 13/64 in, Head Type Round, Square Height 0.188 in to 0.219 in, Square Width 0.368 in to 0.388 in, Tensile Strength 100, 000 psi