73781CM-720: NUT,SELF-LOCKING,CASTELLATED,HEX.
NUT,SELF-LOCKING,CASTELLATED,HEX. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: SLOTTED HEXAGON, lubrication: DRY FILM LUBRICANT, temp_rating: 450.0 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 5310-01-118-9138, 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 | 450.0 FAHRENHEIT MAXIMUM DEGF |
| thread_class | 3B |
| thread_series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| overall_height | 0.437 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN |
| locking_feature | PREVAILING TORQUE ALL METAL DESIGN |
| thread_direction | RIGHT-HAND |
| washer_thickness | 0.054 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN |
| width_across_flats | 0.494 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN |
| nominal_thread_size | 0.437 INCHES IN |
| NSN | 5310-01-118-9138 |
| LUBRICATION | DRY FILM LUBRICANT |
| OVERALL HEIGHT | 0.437 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN |
| WASHER OUTSIDE DIAMETER | 0.645 INCHES MAXIMUM IN |
| WIDTH ACROSS FLATS | 0.494 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |
| TEMP RATING | 450.0 FAHRENHEIT MAXIMUM DEGF |
| WASHER THICKNESS | 0.054 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| NOMINAL THREAD SIZE | 0.437 INCHES IN |