NUT,SELF-LOCKING,ASSEMBLED WASHE. Key specifications include material: STEEL OVERALL, nut_style: EXTERNAL TOOTH, nut_height: 0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), overall_height: 0.270 INCHES NOMINAL IN. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System under NSN 5320-00-639-2651, 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 | EXTERNAL TOOTH |
| nut_height | 0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN |
| thread_class | 2B |
| thread_series | UNIFIED NATIONAL COARSE (UNC) |
| overall_height | 0.270 INCHES NOMINAL IN |
| thread_direction | RIGHT-HAND |
| surface_treatment | ZINC OVERALL |
| width_across_flats | 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| nominal_thread_size | 0.250 INCHES IN |
| washer_outside_diameter | 0.494 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN |
| thread_quantity_per_inch | 20 |
| NSN | 5320-00-639-2651 |
| HEAD STYLE | UNIVERSAL |
| FASTENER LENGTH | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| SHANK STYLE | TUBULAR |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 7228 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| HOLE DIAMETER | 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| HEAD HEIGHT | 0.054 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN |
| SHANK DIAMETER | 0.123 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN |
| HOLE DEPTH | 0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| HEAD MAJOR DIAMETER | 0.238 INCHES MINIMUM AND 0.262 INCHES MAXIMUM IN |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |