256289: 256289.
The 256289 is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740 OVERALL, head_style: ROUND W/WRENCH FLATS CHAMFERED, head_height: 0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN, thread_length: 0.576 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN. This part is cataloged in the U.S.
Government catalog under NSN 2520-00-706-3955, 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 8740 OVERALL |
| head_style | ROUND W/WRENCH FLATS CHAMFERED |
| head_height | 0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN |
| thread_class | 3A A |
| head_diameter | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| thread_length | 0.576 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN |
| surface_finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| fastener_length | 2.555 INCHES MINIMUM AND 2.595 INCHES MAXIMUM IN |
| hardness_rating | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| special_features | EXTENDED DIA ON HEAD 0.500 IN. DIA BY 1.000 IN. LG IN |
| thread_direction | RIGHT-HAND |
| features_provided | FINISHED HEAD |
| NSN | 2520-00-706-3955 |