FULLY THREADED, MACHINE BOLT TYPE; GRADE 2 STEEL MATERIAL; ZINC PLATED FINISH; 2-1/2 INCH; 5/16 INCH HEAD HEIGHT; 3/4 INCH HEAD WIDTH ACROSS FLAT; 1/2 INCH NOMINAL DIAMETER; 13 TPI; QUENCHED AND TEMPERED PROCESS; THREAD TYPE COARSE