178-819: BEARING,ROLLER,CYLINDRICAL.
- High-tech film which protects the display from fingerprints, dust and scratches - Highly transparent crystal clear film for HD quality - Easy to apply without air bubbles, can be removed without leaving any residue - Made in Germany This part is cataloged in the U.S. Government catalog under NSN 3110-00-155-7415, 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 | STEEL OVERALL |
| head_style | HEADLESS (SETSCREW) |
| point_style | CUP |
| thread_class | 3A A |
| fastener_length | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| hardness_rating | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL |
| thread_direction | RIGHT-HAND |
| width_across_flats | 0.094 INCHES NOMINAL IN |
| internal_drive_style | HEXAGON |
| nominal_thread_diameter | 0.190 INCHES IN |
| thread_quantity_per_inch | 32 |
| thread_series_designator | UNF |
| NSN | 3110-00-155-7415 |
| RETAINER FABRICATION METHOD | PRESSED |
| INTERNAL FIT-UP DESIGNATION | STANDARD |
| LOCATING FEATURE | NONLOCATING |
| SURFACE FINISH | GROUND |
| STYLE DESIGNATOR | SINGLE ROW, NON-LOCATING, CYLINDRICAL INNER RING, CYLINDRICAL OUTER RING WITH TWO ROLLER RETAINMENT RINGS ON OUTER, SEPARABLE |
| OVERALL WIDTH | 15.00 MILLIMETERS NOMINAL MM |
| OVERALL OUTSIDE DIAMETER | 52.00 MILLIMETERS NOMINAL MM |
| BORE SHAPE | STRAIGHT |
| STANDARD TOLERANCE DESIGNATION | RBEC NO.1 |
| BORE DIAMETER | 25.00 MILLIMETERS NOMINAL MM |