1/4"-20 X 1 1/4" Carriage Bolt Flat Head Diameter .570-.640 Head Hgt .078-.107 Full Thread Zinc Material: Steel Finish: Zinc Full Size: 1/4"-20x 1 1/4" Diameter: 1/4" Length: 1 1/4" Threads Per Inch: 20 U.O.M.: Imperial Thread Length: Full Thread Thread Type: UNC