| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| THREAD DIRECTION | RIGHT-HAND |
| NUT STYLE | PLATE |
| MATERIAL | IRON ALLOY 660 OVERALL |
| THREAD SERIES | UNF |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3B |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | SILVER OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 49.0 ROCKWELL C MAXIMUM |
| NUT LENGTH | 0.591 INCHES MAXIMUM |
| NUT HEIGHT | 0.281 INCHES MAXIMUM |
| PLATE THICKNESS | 0.055 INCHES MAXIMUM |
| PLATE WIDTH | 0.380 INCHES MINIMUM AND |
| 0.414 INCHES MAXIMUM |
| COUNTERBORE DIAMETER | 0.254 INCHES MINIMUM NUT |
| LUBRICATION | DRY FILM LUBRICANT |
| NUT MOUNTING PROVISION | COUNTERSUNK HOLES OR |
| DIMPLED 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 | 0.276 INCHES MINIMUM AND |
| 0.286 INCHES MAXIMUM |
| CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG WIDTH | 0.217 INCHES MINIMUM AND |
| 0.221 INCHES MAXIMUM |
| TEMP RATING | 400.0 DEG FAHRENHEIT NOMINAL |
| PRECIOUS MATERIAL | SILVER |
| PRECIOUS MATERIAL AND LOCATION | ALL SURFACES SILVER |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS21087-4K |