square neck bolt for Caterpillar equipment, P/N 1J5607. Specs follow: AAJD Thread Class 2A AAJF Thread Direction Right-hand AASA Thread Length 1.750 inches nominal AASB ener Length 3.000 inches nominal AHYM Nominal Thread Diameter 1.000 inches CBBL Features Provided Finished head CMLP Thread Quantity PER Inch 8 CQBC Minimum Tensile Strength 170000 pounds per square inch CQFM Hardness Rating 36.0 rockwell C minimum overall and 42.0 rockwell C maximum overall FEAT Special Features Color black MATT Material Steel overall MDCL Material Document AND Classification Sae grade 8 assn std single material response overall SFTT Surface Treatment Oxide overall THSD Thread Series Designator UNC GTBD8 13030