| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.2500 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.425 INCHES NOMINAL |
| FASTENER LENGTH | 0.5975 INCHES MINIMUM AND |
| 0.6275 INCHES MAXIMUM |
| MATERIAL | TITANIUM ALLOY UNS R56400 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 4928 OR 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| HEAD STYLE | FLAT COUNTERSUNK |
| HEAD DIAMETER | 0.506 INCHES MAXIMUM |
| HEAD HEIGHT | 0.111 INCHES NOMINAL |
| COUNTERSINK ANGLE | 99.0 DEGREES MAXIMUM AND |
| 101.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | HIGH-TORQUE |
| GRIP LENGTH | 0.1775 INCHES MINIMUM AND |
| 0.1975 INCHES MAXIMUM |
| GRIP DIAMETER | 0.2485 INCHES MINIMUM AND |
| 0.2495 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS1790 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,100 DEG FLUSH HEAD,160 KSI UTS |