| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| THREAD DIRECTION | RIGHT-HAND |
| NUT STYLE | PLATE |
| MATERIAL | PLASTIC LOCKING INSERT |
| STEEL OVERALL EXCEPT INSERT |
| THREAD SERIES | UNF |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3B |
| SURFACE TREATMENT | CADMIUM NUT |
| NUT LENGTH | 1.266 INCHES MINIMUM AND |
| 1.296 INCHES MAXIMUM |
| NUT HEIGHT | 0.453 INCHES MAXIMUM |
| PLATE THICKNESS | 0.075 INCHES MAXIMUM |
| PLATE WIDTH | 0.656 INCHES MAXIMUM |
| COUNTERBORE DIAMETER | 0.547 INCHES MINIMUM AND |
| 0.577 INCHES MAXIMUM NUT |
| COUNTERSINK ANGLE | 99.5 DEGREES MINIMUM AND |
| 100.5 DEGREES MAXIMUM NUT |
| NUT MOUNTING PROVISION | STRAIGHT HOLES |
| MOUNTING HOLE ARRANGEMENT STYLE | 2 HOLES |
| MOUNTING HOLE DIAMETER | 0.098 INCHES MINIMUM AND |
| 0.103 INCHES MAXIMUM |
| DISTANCE FROM APERTURE CENTER TO MOUNTING HOLE CENTER | 3.500 INCHES NOMINAL |
| CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG LENGTH | 0.998 INCHES MINIMUM AND |
| 1.002 INCHES MAXIMUM |
| TEMP RATING | 250.0 DEG FAHRENHEIT NOMINAL |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81352 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | ANN5 |
| MANUFACTURERS CODE | 88044 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | AN373F428A |