BBI® 455400 Fully Threaded Cap Screw, 9/16-18, 1-1/2 in L Under Head, 8 Grade, Alloy Steel, Zinc Yellow Bake CR+6

BBI® Cap Screw, Fully Threaded, Imperial, 9/16-18 Thread, 1-1/2 in Length Under Head, 8 Grade, Alloy Steel, Zinc Yellow Bake CR+6, UNF Thread, 23/64 in H Head, Hex Head, 150000 psi Tensile Strength, Material Specification: ASTM B633-Fe, Zn5 Type 2, 33 to 39 HRC Hardness.