| HEAD HEIGHT | 0.040 INCHES NOMINAL |
| HEAD MAJOR DIAMETER | 0.4176 INCHES NOMINAL |
| HEAD MINOR COUNTERSINK ANGLE | 59.0 DEGREES MINIMUM AND 61.0 DEGREES MAXIMUM |
| HEAD MINOR DIAMETER | 0.350 INCHES NOMINAL |
| HEAD MAJOR COUNTERSINK ANGLE | 75.0 DEGREES MINIMUM AND 77.0 DEGREES MAXIMUM |
| HEAD STYLE | ELIPTICAL COUNTERSUNK |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| NUT GRIP RANGE | +0.800 TO 0.820 INCHES |
| NUT DIAMETER | 0.325 INCHES MINIMUM AND 0.327 INCHES MAXIMUM |
| NUT LENGTH | 1.257 INCHES MINIMUM AND 1.277 INCHES MAXIMUM |
| NUT STYLE | BLIND RIVET W/SMOOTH ROUND SHANK |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 304 OR STEEL COMP 305 OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| SHANK END TYPE | OPEN |
| SPECIFICATION/STANDARD DATA | 80205-NAS1734 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 28 |