When your project requires the highest-strength graded bolts, these fasteners meet SAE J429 and ASME B18.2.1 and have a Rockwell hardness rating of C33 to C39. They also have a minimum tensile strength of 150,000 PSI. All cap screws have right hand threads. Use with Grade 8 nuts. Sold in boxes of 25.
Note: Lengths 7" and larger have 1-3/4" of thread.