1/2"-13 X 3 1/4" Carriage Bolt 18-8 Stainless Steel Fully Threaded --- Material: 18-8 Stainless Finish: Plain Full Size: 1/2"-13x 3 1/4" Diameter: 1/2" Length: 3 1/4" Threads Per Inch: 13 U.O.M.: Imperial Thread Length: Full Thread Thread Type: UNC