Countr-Bor Screw, Alloy Steel, Plain Finish, 1/4-20 x 3/4" (Pack of 50)

• Countr-Bor Screws generate higher clamp loads because they are torqued through an external drive (socket); standard hex socket head screws are torqued by an internal drive (hex key) • Heat-treated alloy steel • Class 3A UNC threads • Tensile strength: 180,000 PSI (up to and including 1/2" dia.); 170,000 PSI (over 1/2" dia.) • ANSI Specification B1.1 • All dimensional properties meet IFI-115 and SAE J58 specifications • Lawson Countr-Bor Screws can replace any standard hex socket head screw • 12-point screw fits into same counter-bore hole – use standard 12 point socket NOTE: Use a wrench or socket size which corresponds to the diameter of the screw. For example, a 5/16" dia. screw is installed by using a 5/16", 12 point standard socket.