NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL, nut_style: HEXAGON, thread_class: 3B, thread_series: UNF, overall_height: 0.580 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-733-8679, 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 | STEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL |
| nut_style | HEXAGON |
| thread_class | 3B |
| thread_series | UNF |
| overall_height | 0.580 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN |
| hardness_rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| locking_feature | FREE-RUNNING ALL METAL DESIGN |
| thread_direction | RIGHT-HAND |
| washer_thickness | 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| countersink_angle | 108.0 DEGREES MINIMUM AND 112.0 DEGREES MAXIMUM NUT |
| surface_treatment | CADMIUM OVERALL |
| width_across_flats | 0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| NSN | 5310-00-733-8679 |
| THREAD DIRECTION | RIGHT-HAND |
| LOCKING FEATURE | FREE-RUNNING ALL METAL DESIGN |
| NOMINAL THREAD SIZE | 0.562 INCHES IN |
| THREAD SERIES | UNF |
| THREAD QUANTITY PER INCH | 18 |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| THREAD CLASS | 3B |
| OVERALL HEIGHT | 0.580 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN |
| WIDTH ACROSS FLATS | 0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL |