| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HEAT TREATMENT | SOLUTION HEAT TREATED OVERALL |
| SHEAR STRENGTH | 90000 SINGLE POUNDS PER SQUARE INCH |
| HEAD STYLE | FLUSH (FLAT) COUNTERSUNK (INCLUDED ANGLE - LESS THAN 135 DEG W OR W/O CHAMFER) |
| HEAD MAJOR DIAMETER | 0.371 INCHES MINIMUM AND |
| 0.395 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND |
| 101.0 DEGREES MAXIMUM |
| SHANK STYLE | COUNTERSUNK (UNDRILLED) |
| FASTENER LENGTH | 0.553 INCHES MINIMUM AND |
| 0.573 INCHES MAXIMUM |
| SHANK DIAMETER | 0.249 INCHES MINIMUM AND |
| 0.254 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS1200 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |