AFB1638A: BOLT,SHOULDER.
The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: DEE CHAMFER, head_height: 0.625 INCHES NOMINAL IN, thread_class: 4A A, head_diameter: 1.750 INCHES NOMINAL IN, thread_length: 1.032 INCHES MINIMUM IN. This part is cataloged in the U.S.
Government catalog under NSN 5306-00-281-3259, 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 | DEE CHAMFER |
| head_height | 0.625 INCHES NOMINAL IN |
| thread_class | 4A A |
| head_diameter | 1.750 INCHES NOMINAL IN |
| thread_length | 1.032 INCHES MINIMUM IN |
| shoulder_shape | ROUND FIRST SHOULDER |
| fastener_length | 4.562 INCHES NOMINAL IN |
| hardness_rating | 27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| shoulder_length | 2.624 INCHES NOMINAL FIRST SHOULDER IN |
| special_features | UNDERCUT BETWEEN HEAD AND SHOULDER 1.219 IN. @DIA BY 0.188 IN. LG,UNDERCUT BETWEEN SHOULDER AND THD 1.000 IN. DIA BY 0.281 IN. LG,FLAT POINT 0.438 IN. LG BY 1.000 IN. DIA IN |
| thread_direction | RIGHT-HAND |
| NSN | 5306-00-281-3259 |
| HEAD HEIGHT | 0.625 INCHES NOMINAL IN |
| FASTENER LENGTH | 4.562 INCHES NOMINAL IN |
| SHOULDER LENGTH | 2.624 INCHES NOMINAL FIRST SHOULDER IN |
| DISTANCE FROM CENTERLINE TO FLAT | 0.688 INCHES NOMINAL IN |
| SHOULDER DIAMETER | 1.312 INCHES NOMINAL FIRST SHOULDER IN |
| THREAD LENGTH | 1.032 INCHES MINIMUM IN |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| HARDNESS RATING | 27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| SHANK UNTHREADED HOLE DIAMETER | 0.188 INCHES NOMINAL ALL HOLES IN |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-890 ALLOY 2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |