This L9 hex head cap screw has a head height of 0.67 to 0.706 inches, a head width of 1.469 to 1.5 inches, and a fastener length of eight inches. It has a 1"-14 UNF thread and a minimum thread length of 2 1/2 inches. It is made of alloy steel with a yellow zinc finish. It has a Rockwell hardness of 38/42 C, a proof load of 145,000 PSI, a tensile strength of 180,000 PSI, and a maximum temperature of 400 Degrees F.