51B221-23: SCREW,MACHINE.
The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: PAN, head_height: 0.103 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.381 INCHES NOMINAL IN, thread_length: 0.276 INCHES MINIMUM IN, screw_material: STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740. This part is cataloged in the U.S.
Government catalog under NSN 5305-00-917-0993, 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.
| head_style | PAN |
| head_height | 0.103 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN |
| thread_class | 2A A |
| head_diameter | 0.381 INCHES NOMINAL IN |
| thread_length | 0.276 INCHES MINIMUM IN |
| screw_material | STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 |
| fastener_length | 1.423 INCHES MINIMUM AND 1.470 INCHES MAXIMUM IN |
| hardness_rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| thread_direction | RIGHT-HAND |
| internal_drive_style | TORQUE SET |
| shank_surface_finish | 32.0 MICROINCHES |
| nominal_thread_diameter | 0.190 INCHES IN |
| NSN | 5305-00-917-0993 |
| HEAD HEIGHT | 0.103 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN |
| FASTENER LENGTH | 1.423 INCHES MINIMUM AND 1.470 INCHES MAXIMUM IN |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE |
| THREAD LENGTH | 0.276 INCHES MINIMUM IN |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| SHANK SURFACE FINISH | 32.0 MICROINCHES |
| NOMINAL THREAD DIAMETER | 0.190 INCHES IN |
| HEAD STYLE | PAN |
| THREAD DIRECTION | RIGHT-HAND |
| SPECIFICATION/STANDARD DATA | 76823-51B221 MANUFACTURERS STANDARD |
No substitute or cross-reference records for this part.