The BOLT,KEY HEAD is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, head_style: FLAT COUNTERSUNK REVERSE KEYED, key_length: 0.469 INCHES NOMINAL IN, head_height: 0.656 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 2.156 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 5305-00-013-8244, 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 4140 OVERALL |
| head_style | FLAT COUNTERSUNK REVERSE KEYED |
| key_length | 0.469 INCHES NOMINAL IN |
| head_height | 0.656 INCHES NOMINAL IN |
| thread_class | 2A A |
| head_diameter | 2.156 INCHES NOMINAL IN |
| thread_length | 2.500 INCHES MINIMUM IN |
| fastener_length | 6.500 INCHES NOMINAL IN |
| hardness_rating | 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| special_features | FURNISHED W/1 NUT AND 1 WASHER |
| thread_direction | RIGHT-HAND |
| countersink_angle | 78.0 DEGREES NOMINAL |
| NSN | 5305-00-013-8244 |
| MINIMUM YIELD STRENGTH | 140000 POUNDS PER SQUARE INCH LBS |
| THREAD LENGTH | 1.250 INCHES MAXIMUM IN |
| THREAD QUANTITY PER INCH | 16 |
| HEAD STYLE | FLAT CHAMFER |
| THREAD DIRECTION | RIGHT-HAND |
| NOMINAL THREAD DIAMETER | 0.375 INCHES IN |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| HEAD HEIGHT | 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| INTERNAL DRIVE STYLE | HEXAGON |