| FASTENER LENGTH | 0.829 INCHES MINIMUM AND 0.874 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| HEAD DIAMETER | 0.572 INCHES MINIMUM AND 0.638 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6050 MIL SPEC SINGLE MATERIAL RESPONSE OR AN-S-9 MIL STD SINGLE MATERIAL RESPONSE |
| SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES |