16990-4F-12: SCREW,CAP,SOCKET HEAD.
The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.480 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN, thread_length: 0.517 INCHES MINIMUM AND 0.588 INCHES MAXIMUM IN, fastener_length: 0.750 INCHES NOMINAL IN. This part is cataloged in the U.S.
Government catalog under NSN 5305-01-420-2154, 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 | FLAT COUNTERSUNK |
| thread_class | 3A A |
| head_diameter | 0.480 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| thread_length | 0.517 INCHES MINIMUM AND 0.588 INCHES MAXIMUM IN |
| fastener_length | 0.750 INCHES NOMINAL IN |
| hardness_rating | 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| thread_direction | RIGHT-HAND |
| countersink_angle | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| surface_treatment | OXIDE OVERALL |
| width_across_flats | 0.156 INCHES NOMINAL IN |
| internal_drive_style | HEXAGON |
| NSN | 5305-01-420-2154 |
| WIDTH ACROSS FLATS | 0.156 INCHES NOMINAL IN |
| FASTENER LENGTH | 0.750 INCHES NOMINAL IN |
| THREAD LENGTH | 0.517 INCHES MINIMUM AND 0.588 INCHES MAXIMUM IN |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | FED STD 66, ALLOY FED STD ALL MATERIAL RESPONSES OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES IN |
| HEAD STYLE | FLAT COUNTERSUNK |
| THREAD DIRECTION | RIGHT-HAND |
| COLOR | BLACK OVERALL |
| SURFACE TREATMENT | OXIDE OVERALL |
No substitute or cross-reference records for this part.