| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.599 INCHES MINIMUM AND |
| 0.639 INCHES MAXIMUM |
| FASTENER LENGTH | 0.740 INCHES MINIMUM AND |
| 0.760 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 8740 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND |
| 32.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
| HEAD STYLE | TEE NO. 6 |
| HEAD HEIGHT | 0.146 INCHES MINIMUM AND |
| 0.166 INCHES MAXIMUM |
| HEAD LENGTH | 0.480 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.370 INCHES MINIMUM AND |
| 0.380 INCHES MAXIMUM |
| CHAMFER ANGLE | 45.0 DEGREES NOMINAL |
| SURFACE FINISH | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| 63.0 MICROINCHES GRIP |
| 32.0 MICROINCHES THREADS |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS9398-10 |