ASTM A307/ASTM A563 MATERIAL; 2-1/2 INCH; 2.5 LENGTH - DECIMAL; 2-1/2 LENGTH - FRACTIONAL; 1/2 INCH NOMINAL DIAMETER; UNC THREAD SERIES; 13 TPI; SAE J429 APPLICABLE STANDARD; 1/2 NOMINAL DIAMETER - FRACTIONAL; .5 NOMINAL DIAMETER - DECIMAL