| THREAD SERIES | UNJF |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | STEEL COMP E4340 OR |
| STEEL COMP 4340 OR |
| STEEL COMP 8740 NUT |
| STEEL COMP 1050 WASHER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR |
| MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR |
| MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE NUT |
| ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE WASHER |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND |
| 40.0 ROCKWELL C MAXIMUM |
| NUT STYLE | PLAIN DISHED |
| WASHER OUTSIDE DIAMETER | 0.525 INCHES MAXIMUM |
| OVERALL HEIGHT | 0.340 INCHES MINIMUM AND |
| 0.360 INCHES MAXIMUM |
| NUT HEIGHT | 0.263 INCHES MINIMUM AND |
| 0.283 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.305 INCHES MINIMUM AND |
| 0.313 INCHES MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| NUT COUNTERBORE DEPTH | 0.072 INCHES MINIMUM AND |
| 0.087 INCHES MAXIMUM NUT |
| COUNTERBORE DIAMETER | 0.277 INCHES MINIMUM AND |
| 0.287 INCHES MAXIMUM NUT |
| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND |
| 100.0 DEGREES MAXIMUM NUT |
| LUBRICATION | SOLUBLE LUBRICANT |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 17446 |
| DESIGN CONTROL REFERENCE | TLN1010L4 |