BBI® 847672 Partially Threaded Cap Screw, 1-8, 3-1/2 in L Under Head, 5 Grade, Medium Carbon Steel, Zinc CR+3

BBI® cap screw, partially threaded, measurement system: imperial, 1-8 thread, 3-1/2 in L under head, 5 grade, medium carbon steel, zinc CR+3, UNC thread, 39/64 in H head, hex head, 120,000 psi tensile strength, material specification: ASTM B633, 1 in shank, 25 to 34 HRC hardness.