Socket Head Cap Screw, Head Style Flat Head, Alloy Steel, Finish Black Oxide, Thread Size 7/16-14, Drive Type Hex Socket, Drive Size 1/4 In, Decimal Equivalent 0.250 In, Thread Type UNC, Thread Style Fully Threaded, Thread Direction Right Handed, Length under Head 1 In, Thread Length 1 In, Head Height 0.234 In, Head Dia 0.844 In, Class 3A, Rockwell Hardness RC 38-43, Min Tensile Strength 180, 000 PSI, Meets/Exceeds ASTM A574/ANSI B 18.3, Package Quantity 100 RestrictionsNote: Thread lengths for partially threaded screws are minimum values; lengths may vary. Fully and partially threaded zinc-plated flat head cap screws are available on DrillSpot.com . Search for "fully threaded or partially threaded zinc-plated flat head cap screws". DrillSpot Approved VendorMin. tensile strength: 145,000 psi and up to 1/2"; 135,000 psi over 1/2" Rockwell hardness: C39 to C44 up to 1/2"; R37 to RC44 over 1/2"Camcar/Kerr LakesideMin. tensile strength: 145,000 psi up to 1/2"; 135,000 psi over 1/2" Rockwell Hardness: C38 to C44Alloy Steel Flat Head Cap ScrewsThread class: 3A, right-hand threads Meet ASTMF835/ANSI B18.3 standards