Double-End Threaded Rod, End Type Straight Cut, Material Steel, Finish Zinc Plated, Wrench Flats No, Overall Length 18 in, System of Measurement Inch, Thread Length A 1 1/2 in, Thread Length B 1 1/2 in, Thread Size A 1/4 In.-28, Thread Size B 1/4 In.-28, Rockwell Hardness B80 Min