FLANGED TYPE; STAINLESS STEEL MATERIAL; ZINC ELECTROPLATED FINISH; 1-1/2 INCH; 5/16 INCH HEAD HEIGHT; 3/4 INCH HEAD WIDTH ACROSS FLAT; 1-1/4 INCH THREAD LENGTH; 1/2 INCH NOMINAL DIAMETER; UNC THREAD SERIES; 13 TPI; SAE J429 APPLICABLE STANDARD