| BEARING SURFACE TYPE | WASHER FACED OR CHAMFERED |
| COUNTERSINK ANGLE | 88.0 DEGREES NOMINAL NUT |
| DEPARTURE FROM CITED DOCUMENT | AS MODIFIED BY SURFACE TREATMENT |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| MATERIAL | PLASTIC POLYAMIDE NYLON LOCKING INSERT |
| MATERIAL | STEEL COMP 1137 NUT |
| NOMINAL THREAD SIZE | 0.500 INCHES |
| NUT HEIGHT | 0.575 INCHES MINIMUM AND 0.610 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM-B-633 TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| SURFACE TREATMENT | ZINC AND CHROMATE OVERALL EXCEPT INSERT |
| TEMP RATING | 250.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 13 |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |