AS9557: BOLT,MACHINE.
The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, head_style: DOUBLE HEXAGON W/HOLE, grip_length: 0.815 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN, head_height: 0.300 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.750 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN. This part is cataloged in the U.S.
Government catalog under NSN 5306-00-151-5709, 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 | IRON ALLOY 660 OVERALL |
| head_style | DOUBLE HEXAGON W/HOLE |
| grip_length | 0.815 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN |
| head_height | 0.300 INCHES NOMINAL IN |
| thread_class | 3A A |
| thread_length | 0.750 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN |
| surface_finish | 32.0 MICROINCHES THREADS |
| fastener_length | 1.625 INCHES NOMINAL IN |
| hardness_rating | 248.0 BRINELL STANDARD MINIMUM AND 341.0 BRINELL STANDARD MAXIMUM OVERALL |
| thread_direction | RIGHT-HAND |
| features_provided | FINISHED HEAD |
| width_between_flats | 0.312 INCHES NOMINAL IN |
| NSN | 5306-00-151-5709 |
| SURFACE FINISH | 32.0 MICROINCHES THREADS |
| SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| EXTENDED WASHER THICKNESS | 0.060 INCHES MINIMUM IN |
| HEAD HEIGHT | 0.300 INCHES NOMINAL IN |
| FASTENER LENGTH | 1.625 INCHES NOMINAL IN |
| EXTENDED WASHER DIAMETER | 0.438 INCHES NOMINAL IN |
| THREAD LENGTH | 0.750 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN |
| HARDNESS RATING | 248.0 BRINELL STANDARD MINIMUM AND 341.0 BRINELL STANDARD MAXIMUM OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES IN |