91251A578: SCREW,CAP,SOCKET HEAD.
The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: KNURLED NO. 1, head_height: 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.457 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN, thread_length: 0.389 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN.
This part is cataloged in the U.S. Government catalog under NSN 5305-01-307-5029, 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 |
| head_style | KNURLED NO. 1 |
| head_height | 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| thread_class | 2A A |
| head_diameter | 0.457 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN |
| thread_length | 0.389 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| fastener_length | 0.500 INCHES NOMINAL IN |
| hardness_rating | 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| thread_direction | RIGHT-HAND |
| surface_treatment | OXIDE OVERALL |
| width_across_flats | 0.250 INCHES NOMINAL IN |
| internal_drive_style | HEXAGON |
| NSN | 5305-01-307-5029 |
| WIDTH ACROSS FLATS | 0.250 INCHES NOMINAL IN |
| HEAD HEIGHT | 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| FASTENER LENGTH | 0.500 INCHES NOMINAL IN |
| THREAD LENGTH | 0.389 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| NOMINAL THREAD DIAMETER | 0.312 INCHES IN |
| HEAD STYLE | KNURLED NO. 1 |
| THREAD DIRECTION | RIGHT-HAND |
| COLOR | BLACK OVERALL |
No substitute or cross-reference records for this part.