Thread Class: 3A Thread Direction: Right-Hand Thread Length: 0.710 Inches Minimum And 0.760 Inches Maximum Fastener Length: 2.345 Inches Minimum And 2.375 Inches Maximum Head Style: Dished Hexagon Head Height: 0.250 Inches Minimum And 0.265 Inches Maximum Width Between Flats: 0.741 Inches Minimum And 0.752 Inches Maximum Grip Diameter: 0.4985 Inches Minimum And 0.4995 Inches Maximum Nominal Thread Diameter: 0.500 Inches Grip Length: 1.615 Inches Minimum And 1.635 Inches Maximum Thread Quantity Per Inch: 20 Minimum Tensile Strength: 160000 Pounds Per Square Inch Hardness Rating: 36.0 Rockwell C Minimum Overall And 40.0 Rockwell C Maximum Overall Surface Finish: 32.0 Microinches Bearing Surface Of Head Surface Finish: 32.0 Microinches Threads Surface Finish: 32.0 Microinches Grip Material: Steel Comp E4340 Overall Or Steel Comp 8740 Overall Material Document And Classification: Mil-S-5000 Mil Spec 1St Material Response Overall Or Mil-S-6049 Mil Spec 2Nd Material Response Overall Or Ams 6322 Assn Std 2Nd Material Response Overall Surface Treatment: Cadmium Overall And Chromate Overall Surface Treatment Document And Classification: Qq-P-416 Type 2 Class 2 Fed Spec Single Treatment Response Overall Thread Series Designator: Unjf Specification/Standard Data: 80205-Nas6608 Professional/Industrial Association Standard