The 500221-1 is a the manufacturer industrial component. Key specifications include head_style: ROUND, head_height: 0.091 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, thread_length: 0.250 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN, screw_material: STEEL. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-01-172-4104, 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 | ROUND |
| head_height | 0.091 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| thread_class | 2A A |
| head_diameter | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| thread_length | 0.250 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| screw_material | STEEL |
| fastener_length | 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| thread_direction | RIGHT-HAND |
| internal_drive_style | CROSS RECESS TYPE 1 |
| nominal_thread_diameter | 0.138 INCHES IN |
| screw_surface_treatment | CADMIUM OR ZINC |
| minimum_tensile_strength | 60000 POUNDS PER SQUARE INCH LBS |
| NSN | 5999-01-172-4104 |