FLANGED TYPE; STAINLESS STEEL MATERIAL; ZINC ELECTROPLATED FINISH; 2-1/2 INCH; 19/64 INCH HEAD HEIGHT; 9/16 INCH HEAD WIDTH ACROSS FLAT; 1 INCH THREAD LENGTH; 3/8 INCH NOMINAL DIAMETER; UNC THREAD SERIES; 16 TPI; SAE J429 APPLICABLE STANDARD