| COUNTERBORE DIAMETER | 0.265 INCHES MINIMUM AND 0.270 INCHES MAXIMUM NUT |
| DISTANCE FROM APERTURE CENTER TO MOUNTING HOLE CENTER | 0.380 INCHES NOMINAL |
| HARDNESS RATING | 19.0 ROCKWELL C MINIMUM AND 26.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 8740 OVERALL |
| MOUNTING HOLE DIAMETER | 0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM |
| MOUNTING HOLE ARRANGEMENT STYLE | 1 HOLE |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT COUNTERBORE DEPTH | 0.075 INCHES MINIMUM AND 0.095 INCHES MAXIMUM NUT |
| NUT LENGTH | 0.732 INCHES MINIMUM AND 0.762 INCHES MAXIMUM |
| NUT HEIGHT | 0.297 INCHES MINIMUM AND 0.312 INCHES MAXIMUM |
| NUT MOUNTING PROVISION | STRAIGHT HOLES |
| NUT STYLE | PLATE |
| PLATE THICKNESS | 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM |
| PLATE WIDTH | 0.412 INCHES MINIMUM AND 0.432 INCHES MAXIMUM |
| SPECIAL FEATURES | BOSS EXTENDS OPPOSITE NUT PROJECTION SIDE 0.085 IN. LONG,0.304 IN. MIN,0.308 IN. MAX OD,0.265 IN. MIN,0.270 IN. MAX ID |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 28 |