The 257-4281 is a the manufacturer industrial component. Key specifications include color: BLACK, overall_depth: 0.625 INCHES NOMINAL IN, inside_diameter: 0.250 INCHES NOMINAL IN, outside_diameter: 1.000 INCHES MAXIMUM IN, screw_drive_type: HEXAGON SOCKET, style_designator: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5355-00-644-3886, 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.
| color | BLACK |
| overall_depth | 0.625 INCHES NOMINAL IN |
| inside_diameter | 0.250 INCHES NOMINAL IN |
| outside_diameter | 1.000 INCHES MAXIMUM IN |
| screw_drive_type | HEXAGON SOCKET |
| style_designator | ROUND |
| attachment_method | SETSCREWS |
| overall_thickness | 0.719 INCHES NOMINAL IN |
| reference_marking | BRILL |
| setscrew_hole_quantity | 2 |
| shaft_accommodation_style | ROUND |
| gripping_surface_condition | GRIP AID |
| NSN | 5355-00-644-3886 |
| GRIPPING SURFACE CONDITION | GRIP AID |
| INSIDE DIAMETER | 0.250 INCHES NOMINAL IN |
| STYLE DESIGNATOR | ROUND |
| REFERENCE MARKING | BRILL |
| ATTACHMENT METHOD | SETSCREWS |
| COLOR | BLACK |
| SETSCREW HOLE QUANTITY | 2 |
| SCREW DRIVE TYPE | HEXAGON SOCKET |
| OUTSIDE DIAMETER | 1.000 INCHES MAXIMUM IN |
| SHAFT ACCOMMODATION STYLE | ROUND |