Product Description: Length: 1.54-1.56", thread: 5/16-24, dished hex head, steel
Product Description: Length: 1.54-1.56", thread: 5/16-24, dished hex head, steel
| Surface Finish | 63.0 microinches bearing surface of head |
| Distance From Head Largest Bearing Surface To Shank Hole Center | 1.425 inches minimum first hole and 1.455 inches maximum first hole |
| Hardness Rating | 36.0 rockwell c minimum overall and 41.0 rockwell c maximum overall |
| Thread Quantity Per Inch | 24 |
| Grip Length | 1.062 inches minimum and 1.078 inches maximum |
| Nominal Thread Diameter | 0.312 inches |
| Shank Unthreaded Hole Diameter | 0.076 inches minimum first hole and 0.086 inches maximum first hole |
| Width Between Flats | 0.492 inches minimum and 0.502 inches maximum |
| Grip Diameter | 0.3108 inches minimum and 0.3117 inches maximum |
| Head Height | 0.157 inches minimum and 0.172 inches maximum |
| Head Style | Dished hexagon |
| Fastener Length | 1.540 inches minimum and 1.560 inches maximum |
| Thread Direction | Right-hand |
| Thread Length | 0.311 inches minimum and 0.378 inches maximum |
| Thread Class | 3a |
| Surface Finish | 63.0 microinches grip |
| Special Features | W/retaining element |
| Material | Steel overall |
| Material Document and Classification | Mil-b-83050 mil spec single material response overall |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Document and Classification | Qq-p-416 ty 2 cl 2 fed spec all treatment responses overall |
| Thread Series Designator | Unjf |