7/16-14 Coarse Thread Thick Hex Nut Grade 9 DFAR EcoGuard Gray/Silver 1,000 Hr Cor (Pack Qty 1,000) BC-43NF9

For use with bolts with a minimum tensile strength equal to or less than 180,000 psi Nuts shall be made from a steel which conforms to the following chemical composition requirements: Carbon: 0.20-0.55%; Manganese: 0.60% minimum; Phosphorous: 0.04% maximum; Sulfur: 0.05% maximum 1/4 through 5/8 in.: Rockwell C32 - C38, 3/4 and 7/8 in.: Rockwell C35 - C40