| COUNTERSINK ANGLE | 98.5 DEGREES MINIMUM AND 101.5 DEGREES MAXIMUM |
| FASTENER LENGTH | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM |
| HEAD STYLE | FLUSH (FLAT) COUNTERSUNK (INCLUDED ANGLE - LESS THAN 135 DEG W OR W/O CHAMFER) |
| HEAD MAJOR DIAMETER | 0.2566 INCHES MINIMUM AND 0.2976 INCHES MAXIMUM |
| HEAT TREATMENT | ANNEALED OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | NICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL |
| SHANK DIAMETER | 0.155 INCHES MINIMUM AND 0.159 INCHES MAXIMUM |
| SHANK STYLE | STRAIGHT |
| SHEAR STRENGTH | 49000 SINGLE POUNDS PER SQUARE INCH |