1211478-1: SCREW,EXTERNALLY RELIEVED BODY.
The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 416 OVERALL, head_style: FLAT CHAMFER, head_height: 0.188 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.438 INCHES NOMINAL IN, thread_length: 0.250 INCHES MINIMUM IN. This part is cataloged in the U.S.
Government catalog under NSN 5305-00-656-0232, 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 416 OVERALL |
| head_style | FLAT CHAMFER |
| head_height | 0.188 INCHES NOMINAL IN |
| thread_class | 2A A |
| head_diameter | 0.438 INCHES NOMINAL IN |
| thread_length | 0.250 INCHES MINIMUM IN |
| fastener_length | 0.312 INCHES NOMINAL IN |
| thread_direction | RIGHT-HAND |
| surface_treatment | PASSIVATE OVERALL |
| internal_drive_style | SLOT |
| nominal_thread_diameter | 0.312 INCHES IN |
| first_diameter_from_head | 0.253 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN |
| NSN | 5305-00-656-0232 |
| HEAD HEIGHT | 0.188 INCHES NOMINAL IN |
| FASTENER LENGTH | 0.312 INCHES NOMINAL IN |
| THREAD LENGTH | 0.250 INCHES MINIMUM IN |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| FIRST DIAMETER FROM HEAD | 0.253 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN |
| NOMINAL THREAD DIAMETER | 0.312 INCHES IN |
| HEAD STYLE | FLAT CHAMFER |
| THREAD DIRECTION | RIGHT-HAND |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.062 INCHES NOMINAL IN |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 |