MS9557-06: 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, head_height: 0.300 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.401 INCHES MINIMUM AND 0.421 INCHES MAXIMUM IN, fastener_length: 0.500 INCHES NOMINAL IN. This part is cataloged in the U.S.
Government catalog under NSN 5306-00-121-2671, 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 |
| head_height | 0.300 INCHES NOMINAL IN |
| thread_class | 3A A |
| thread_length | 0.401 INCHES MINIMUM AND 0.421 INCHES MAXIMUM IN |
| fastener_length | 0.500 INCHES NOMINAL IN |
| thread_direction | RIGHT-HAND |
| features_provided | FINISHED HEAD |
| width_between_flats | 0.312 INCHES NOMINAL IN |
| nominal_thread_diameter | 0.250 INCHES IN |
| extended_washer_diameter | 0.438 INCHES NOMINAL IN |
| thread_quantity_per_inch | 28 |
| NSN | 5306-00-121-2671 |
| SURFACE FINISH | 32.0 MICROINCHES THREADS |
| SURFACE FINISH | 32.0 MICROINCHES GRIP |
| SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| EXTENDED WASHER THICKNESS | 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN |
| HEAD HEIGHT | 0.300 INCHES NOMINAL IN |
| FASTENER LENGTH | 0.500 INCHES NOMINAL IN |
| EXTENDED WASHER DIAMETER | 0.438 INCHES NOMINAL IN |
| THREAD LENGTH | 0.401 INCHES MINIMUM AND 0.421 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 |
No substitute or cross-reference records for this part.