FULLY THREADED, MACHINE BOLT TYPE; GRADE 2 STEEL MATERIAL; ZINC PLATED FINISH; 1-1/2 INCH; 13/64 INCH HEAD HEIGHT; 1/2 INCH HEAD WIDTH ACROSS FLAT; 5/16 INCH NOMINAL DIAMETER; 18 TPI; QUENCHED AND TEMPERED PROCESS; THREAD TYPE COARSE