19 models in the 688 series, 8–8 mm bore. Every row links to the full specification page and to the cross-reference page of that model.
| Model | Brand | Bore d (mm) | OD D (mm) | Width B (mm) | |
|---|---|---|---|---|---|
| 688 | ANDGE | 8 | 16 | 4 | Cross-ref → |
| 688 | NACHI | 8 | 16 | 4 | Cross-ref → |
| 688 | NSK | 8 | 16 | 4 | Cross-ref → |
| 688 | NTN | 8 | 16 | 4 | Cross-ref → |
| 688-2RS/Z2 | ANDGE | 8 | 16 | 4 | — |
| 688-Z | ANDGE | 8 | 16 | 5 | — |
| 688-ZC3 | ANDGE | 8 | 16 | 5 | — |
| 688-ZZ | ANDGE | 8 | 16 | 5 | Cross-ref → |
| 688-ZZ/P5 | ANDGE | 8 | 16 | 5 | — |
| 688-ZZ/P6 | ANDGE | 8 | 16 | 5 | — |
| 688-ZZC3 | ANDGE | 8 | 16 | 5 | — |
| 688-ZZC3P6QE6 | ANDGE | 8 | 16 | 5 | — |
| 688A | NSK | 8 | 16 | 4 | Cross-ref → |
| 688A | NTN | 8 | 16 | 4 | Cross-ref → |
| 688ADD | NSK | 8 | 16 | 5 | — |
| 688AVV | NSK | 8 | 16 | 5 | — |
| 688AZZ1 | NSK | 8 | 16 | 5 | — |
| 688C3 | ANDGE | 8 | 16 | 4 | — |
| 688ZZ | ANDGE | 8 | 16 | 5 | Cross-ref → |
688 series bearings follow the ISO dimension plan for this family, so a given number is dimensionally interchangeable between brands - see the cross-reference to confirm. Choose the suffix for your duty: shields for dry, clean positions, contact seals for wet or dusty ones, and a larger clearance class where the fit or temperature demands it.
Other Deep Groove Ball Bearings series: 62 · 60 · 63 · 618 · 619 · 69 · 68 · 160