Hex Head Cap Screw Head Type Hex Diameter 1/4 In. Grade Non Graded Material 18-8 Stainless Steel Finish Plain Thread Size 28 Thread Type Fine Length under Head 5/8 In. Head Width 7/16 In. Thread Style Fully Threaded Thread Direction Right Hand Tensile Strength 100 000 to 150 000 psi Rockwell Hardness B80 to C32 Meets/Exceeds ASTM F593 and ASME B18.2.1 Package Quantity 100