Hex cap screws grade 9We carry Grade 9 Hex Cap Screws in various diameters and thread pitches. F911 hardware will only be available while supplies last, we will no longer carry this brand. However the L9 brand hardware still has the same strength properties as F911 both being made in the U.S.A. as well. Available in coarse and fine threads all yellow zinc plated. Grade 9 bolts are made with a 8640 Alloy steel which is the ultimate in high strength steel. The Grade 8 counterpart has a tensile strength of 150,000psi whereas Grade 9 hardware has a tensile strength of 180,000psi.