| CHAMFER ANGLE | 43.0 DEGREES NOMINAL AND 47.0 DEGREES NOMINAL |
| FASTENER LENGTH | 22.20 MILLIMETERS NOMINAL AND 21.95 MILLIMETERS MINIMUM AND 22.45 MILLIMETERS MAXIMUM |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| HEAD HEIGHT | 3.71 MILLIMETERS MINIMUM AND 4.21 MILLIMETERS MAXIMUM |
| HEAD LENGTH | 12.20 MILLIMETERS MINIMUM AND 12.70 MILLIMETERS MAXIMUM |
| HEAD STYLE | TEE NO. 6 |
| MATERIAL DOCUMENT AND CLASSIFICATION | DTD 5638 MIL STD SINGLE MATERIAL RESPONSE OR EB2952 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OR EN3219 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | NICKEL ALLOY |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| WIDTH BETWEEN FLATS | 9.40 MILLIMETERS MINIMUM AND 9.65 MILLIMETERS MAXIMUM |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 18.85 MILLIMETERS NOMINAL |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNJF |