Product Description: Flat head, high torque internal drive
Product Description: Flat head, high torque internal drive
| Material | Steel |
| Material Document and Classification | Sps-m-107,fscm 56878 mfr ref single material response overall |
| Countersink Angle | 99 degrees minimum and 101 degrees maximum |
| Hardness Rating | 51.0 rockwell c minimum overall and 54.0 rockwell c maximum overall |
| Minimum Tensile Strength | 260000 pounds per square inch |
| Thread Quantity Per Inch | 24 |
| Grip Length | 0.865 inches minimum and 0.885 inches maximum |
| Nominal Thread Diameter | 0.312 inches |
| Internal Drive Style | High-torque |
| Grip Diameter | 0.3108 inches minimum and 0.3117 inches maximum |
| Head Diameter | 0.573 inches minimum and 0.635 inches maximum |
| Head Style | Flat countersunk |
| Thread Length | 0.333 inches minimum and 0.400 inches maximum |
| Fastener Length | 1.218 inches minimum and 1.265 inches maximum |
| Thread Class | 3a |
| Thread Direction | Right-hand |
| Surface Treatment | Cadmium |
| Surface Treatment Document and Classification | Qq-p-416,ty 1, cl 2 fed spec single treatment response overall |
| Thread Series Designator | Unjf |
| Specification/standard Data | 26512-gb510m manufacturers standard |