A51B52591-411: NUT,PLAIN,RECTANGULAR.
The NUT,PLAIN,RECTANGULAR is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, nut_style: PLAIN, RECTANGULAR, nut_width: 0.420 INCHES NOMINAL IN, nut_height: 0.125 INCHES NOMINAL IN, nut_length: 0.540 INCHES NOMINAL IN, thread_class: 3B. This part is cataloged in the U.S.
Government catalog under NSN 5310-01-092-0996, 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 4130 OVERALL |
| nut_style | PLAIN, RECTANGULAR |
| nut_width | 0.420 INCHES NOMINAL IN |
| nut_height | 0.125 INCHES NOMINAL IN |
| nut_length | 0.540 INCHES NOMINAL IN |
| thread_class | 3B |
| thread_series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| hardness_rating | 37.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| special_features | HOLE IS CSK TO A DIA. OF 0.275 INCHES; ONE CORNER OF NUT IS CHAMFERED 0.160 INCHES BY 45 DEG. IN |
| thread_direction | RIGHT-HAND |
| countersink_angle | 90.0 DEGREES NOMINAL FIRST END |
| surface_treatment | CADMIUM AND CHROMATE OVERALL |
| NSN | 5310-01-092-0996 |
| NUT WIDTH | 0.420 INCHES NOMINAL IN |
| NUT LENGTH | 0.540 INCHES NOMINAL IN |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| NOMINAL THREAD SIZE | 0.250 INCHES IN |
| NUT HEIGHT | 0.125 INCHES NOMINAL IN |
| SPECIAL FEATURES | ONE END CHAMFERED 0.040 IN. X 45 DEG BOTH SURFACES AND ONE CORNER OF OPPOSITE END CHAMFERED 0.160 IN. X 45 DEG IN |
| NUT STYLE | PLAIN, RECTANGULAR |
| THREAD CLASS | 3B |