| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| NUT STYLE | HEXAGON |
| OVERALL HEIGHT | 0.204 INCHES MINIMUM AND 0.316 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS6322 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6325 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6280 ASSN STD SINGLE MATERIAL RESPONSE OR ASTMA304 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6300 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 4027 OR STEEL COMP 4037 OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| SPECIAL FEATURES | ITEM IS FAA CERTIFIED |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH | 28 |
| WASHER OUTSIDE DIAMETER | 0.420 INCHES MAXIMUM |
| WASHER THICKNESS | 0.019 INCHES MINIMUM |
| WIDTH ACROSS FLATS | 0.304 INCHES MINIMUM AND 0.316 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |