The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include head_style: FLAT CHAMFER, head_height: 0.546 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN, thread_length: 0.303 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN, fastener_length: 1.375 INCHES NOMINAL IN. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-147-9748, 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.
| head_style | FLAT CHAMFER |
| head_height | 0.546 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN |
| thread_class | 3A A |
| head_diameter | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| thread_length | 0.303 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| fastener_length | 1.375 INCHES NOMINAL IN |
| special_features | STRAIGHT KNURL ON SIDE OF HEAD |
| thread_direction | RIGHT-HAND |
| internal_drive_style | SLOT |
| nominal_thread_diameter | 0.250 INCHES IN |
| first_diameter_from_head | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| thread_quantity_per_inch | 20 |
| NSN | 5305-01-147-9748 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN |
| FASTENER LENGTH | 1.375 INCHES NOMINAL IN |
| THREAD CLASS | 3A A |
| THREAD QUANTITY PER INCH | 20 |
| HEAD DIAMETER | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| SPECIAL FEATURES | STRAIGHT KNURL ON SIDE OF HEAD |
| NOMINAL THREAD DIAMETER | 0.250 INCHES IN |
| THREAD DIRECTION | RIGHT-HAND |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 |