Grade 5 hex head bolts, course thread, are clear dura-plated for corrosion resistance.  They are made in North America, rated for 120,000 psi tensile minimum strength, conform to SAE J429 specifications and are DIC approved.  These cap screws have a rockwell hardness of c33-c39, exceeding ASTM, ANSI, GM, FORD, and CAT specifications.  They are also roll threaded to class 2-A thread fit, as well as head marked with the manufacturers symbol and 3 radial lines as shown below.  Certifications and destructive test results available upon request.  3/8" diameter and 2 1/2" length.

 Grade 5