BACB30LR4U20: SCREW,CLOSE TOLERANCE.
The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, head_style: FLAT COUNTERSUNK, grip_length: 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN, thread_class: 3A A, grip_diameter: 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN, head_diameter: 0.455 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN. This part is cataloged in the U.S.
Government catalog under NSN 5305-01-049-7799, 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 | IRON ALLOY 660 OVERALL |
| head_style | FLAT COUNTERSUNK |
| grip_length | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN |
| thread_class | 3A A |
| grip_diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| head_diameter | 0.455 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| thread_length | 0.400 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| surface_finish | 32.0 MICROINCHES THREADS |
| fastener_length | 1.660 INCHES MINIMUM AND 1.690 INCHES MAXIMUM IN |
| thread_direction | RIGHT-HAND |
| countersink_angle | 100.0 DEGREES NOMINAL |
| surface_treatment | PASSIVATE OVERALL |
| NSN | 5305-01-049-7799 |
| SURFACE FINISH | 32.0 MICROINCHES THREADS |
| SURFACE FINISH | 32.0 MICROINCHES GRIP |
| FASTENER LENGTH | 1.660 INCHES MINIMUM AND 1.690 INCHES MAXIMUM IN |
| THREAD LENGTH | 0.400 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| NOMINAL THREAD DIAMETER | 0.250 INCHES IN |
| HEAD STYLE | FLAT COUNTERSUNK |
| THREAD DIRECTION | RIGHT-HAND |
| GRIP LENGTH | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN |
| GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| SURFACE TREATMENT | PASSIVATE OVERALL |
No substitute or cross-reference records for this part.