| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
| FASTENER LENGTH | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM |
| HEAD STYLE | FLUSH (FLAT) COUNTERSUNK (INCLUDED ANGLE - LESS THAN 135 DEG W OR W/O CHAMFER) |
| HEAD MAJOR DIAMETER | 0.3710 INCHES MINIMUM AND 0.3948 INCHES MAXIMUM |
| HEAT TREATMENT | SOLUTION HEAT TREATED OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| SHANK DIAMETER | 0.249 INCHES MINIMUM AND 0.254 INCHES MAXIMUM |
| SHEAR STRENGTH | 90000 SINGLE POUNDS PER SQUARE INCH |
| SHANK STYLE | COUNTERSUNK (UNDRILLED) |
| SPECIFICATION/STANDARD DATA | 80250-NAS1200 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |