| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 1.251 INCHES NOMINAL |
| GRIP DIAMETER | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM |
| GRIP LENGTH | 0.750 INCHES NOMINAL |
| HEAD HEIGHT | 0.015 INCHES MAXIMUM |
| HEAD DIAMETER | 0.4787 INCHES MAXIMUM |
| HEAD STYLE | FILLISTER COUNTERSUNK |
| INTERNAL DRIVE STYLE | TORX |
| MATERIAL DOCUMENT AND CLASSIFICATION | UNABLE TO DECODE |
| MATERIAL | UNABLE TO DECODE |
| MINIMUM TENSILE STRENGTH | 5000 POUNDS PER SQUARE INCH |
| POINT STYLE | FLAT |
| NOMINAL THREAD DIAMETER | 0.3125 INCHES |
| SPECIFICATION/STANDARD DATA | 80205-NAS5320 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| SPLINE MAJOR DIAMETER | 0.221 INCHES NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | UNABLE TO DECODE |
| SURFACE TREATMENT | UNABLE TO DECODE |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.501 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |