A51B27581-13: BOLT,SHOULDER.
The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: ROUND W/WRENCH FLATS, head_height: 0.250 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 1.750 INCHES NOMINAL IN, thread_length: 0.640 INCHES MAXIMUM IN. This part is cataloged in the U.S.
Government catalog under NSN 5306-00-972-3963, 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 | ROUND W/WRENCH FLATS |
| head_height | 0.250 INCHES NOMINAL IN |
| thread_class | 3A A |
| head_diameter | 1.750 INCHES NOMINAL IN |
| thread_length | 0.640 INCHES MAXIMUM IN |
| shoulder_shape | ROUND FIRST SHOULDER |
| fastener_length | 3.096 INCHES NOMINAL IN |
| hardness_rating | 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL |
| shoulder_length | 2.456 INCHES NOMINAL FIRST SHOULDER IN |
| special_features | MIN THICKNESS OF SILVER PLATE TO BE 0.0002 ON THREADED AREA |
| thread_direction | RIGHT-HAND |
| NSN | 5306-00-972-3963 |
| HEAD HEIGHT | 0.250 INCHES NOMINAL IN |
| FASTENER LENGTH | 3.096 INCHES NOMINAL IN |
| SHOULDER LENGTH | 2.456 INCHES NOMINAL FIRST SHOULDER IN |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| PRECIOUS MATERIAL | SILVER |
| SHOULDER DIAMETER | 1.2465 INCHES MINIMUM AND 1.2470 INCHES MAXIMUM FIRST SHOULDER IN |
| THREAD LENGTH | 0.640 INCHES MAXIMUM IN |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| HARDNESS RATING | 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL |
| SHANK UNTHREADED HOLE DIAMETER | 0.141 INCHES NOMINAL FIRST HOLE IN |
No substitute or cross-reference records for this part.