| THREAD SERIES | UNJF |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | STEEL COMP 8740 NUT |
| STEEL COMP 1040 OR |
| STEEL COMP 1042 OR |
| STEEL COMP 1050 WASHER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OR |
| AMS6322 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| AISI ASSN STD ALL MATERIAL RESPONSES WASHER |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND |
| 40.0 ROCKWELL C MAXIMUM |
| NUT STYLE | DOUBLE HEXAGON |
| WASHER OUTSIDE DIAMETER | 0.460 INCHES MAXIMUM |
| OVERALL HEIGHT | 0.271 INCHES MINIMUM AND |
| 0.291 INCHES MAXIMUM |
| WASHER THICKNESS | 0.072 INCHES MINIMUM AND |
| 0.087 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.274 INCHES MINIMUM AND |
| 0.284 INCHES MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| TEMP RATING | 450.0 DEG FAHRENHEIT NOMINAL |
| SPECIFICATION/STANDARD DATA | 81205-BACN10HY PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |