NUT,PLAIN,SINGLE BALL SEAT,HEXAG. Key specifications include material: STEEL OVERALL, nut_style: SINGLE BALL SEAT, HEXAGON, nut_height: 0.880 INCHES NOMINAL IN, thread_class: 2B, thread_series: UN, hardness_rating: 88.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 90.0 ROCKWELL SUPERFICIAL 15-N 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 5310-00-518-5566, 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 OVERALL |
| nut_style | SINGLE BALL SEAT, HEXAGON |
| nut_height | 0.880 INCHES NOMINAL IN |
| thread_class | 2B |
| thread_series | UN |
| hardness_rating | 88.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 90.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM |
| ball_seat_radius | 0.875 INCHES NOMINAL IN |
| thread_direction | LEFT-HAND |
| surface_treatment | ZINC AND CHROMATE OVERALL EXCEPT THREADS |
| width_across_flats | 1.485 INCHES NOMINAL IN |
| nominal_thread_size | 1.125 INCHES IN |
| thread_quantity_per_inch | 16 |
| NSN | 5310-00-518-5566 |
| THREAD SERIES | UNF |
| NOMINAL THREAD SIZE | 0.750 INCHES IN |
| FEATURES PROVIDED | CASEHARDENED |
| THREAD QUANTITY PER INCH | 16 |
| NUT HEIGHT | 0.859 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN |
| WIDTH ACROSS FLATS | 1.475 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | LEFT-HAND |
| NUT STYLE | SINGLE BALL SEAT, HEXAGON |