| FASTENER LENGTH | 39.926 MILLIMETERS NOMINAL |
| HEAD HEIGHT | 6.73 MILLIMETERS MINIMUM AND 7.54 MILLIMETERS MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5659 15-5PH CONDITION H925 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD DIAMETER | 0.4375 INCHES |
| SHOULDER DIAMETER | 12.57 MILLIMETERS MINIMUM AND 12.67 MILLIMETERS MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER LENGTH | 23.813 MILLIMETERS MINIMUM AND 24.079 MILLIMETERS MAXIMUM FIRST SHOULDER |
| WIDTH BETWEEN FLATS | 18.80 MILLIMETERS MINIMUM AND 19.10 MILLIMETERS MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OR AMS 2700 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 15.73 MILLIMETERS MINIMUM AND 16.23 MILLIMETERS MAXIMUM |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNJF |