73781CM-820: NUT,SELF-LOCKING,EXTENDED WASHER.
NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: SLOTTED HEXAGON, lubrication: DRY FILM LUBRICANT, temp_rating: 1800.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the U.S.
Government catalog under NSN 5310-01-281-8548, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.
Verify compatibility with your specific system configuration before ordering.
| material | IRON ALLOY 660 OVERALL |
| nut_style | SLOTTED HEXAGON |
| lubrication | DRY FILM LUBRICANT |
| temp_rating | 1800.0 FAHRENHEIT MAXIMUM DEGF |
| thread_class | 3B |
| thread_series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| overall_height | 0.548 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN |
| locking_feature | PREVAILING TORQUE ALL METAL DESIGN |
| thread_direction | RIGHT-HAND |
| washer_thickness | 0.070 INCHES NOMINAL IN |
| width_across_flats | 0.554 INCHES MINIMUM AND 0.566 INCHES MAXIMUM IN |
| nominal_thread_size | 0.500 INCHES IN |
| NSN | 5310-01-281-8548 |
| LUBRICATION | DRY FILM LUBRICANT |
| OVERALL HEIGHT | 0.548 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN |
| WASHER OUTSIDE DIAMETER | 0.770 INCHES MAXIMUM IN |
| WIDTH ACROSS FLATS | 0.554 INCHES MINIMUM AND 0.566 INCHES MAXIMUM IN |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |
| TEMP RATING | 1800.0 FAHRENHEIT MAXIMUM DEGF |
| WASHER THICKNESS | 0.070 INCHES NOMINAL IN |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| NOMINAL THREAD SIZE | 0.500 INCHES IN |
No substitute or cross-reference records for this part.