| Dimensions (metric) | d | 8 | ![]() Open |
| D | 16 | ||
| B | 4 | ||
| Approx. Wgt. lbs | .0070 | ||
| Interchange | ADR | - | |
| ISC | 688h | ||
| NMB | SSL-1680 | ||
| NTN | F688 | ||
| RMB | UL816X | ||
| SKF | W618/8 | ||
| 1) Outer races, inner races and balls are manufactured from 440C or equivalent stainless steel. They are through hardened to a hardness of 55-57RC. 2) The cages are manufactured from 304 or equivalent stainless steel. | |||
Hot number:TIMKEN 538/533A OKB 28308 OKB 665413 AST 22217C Timken 355X/354A KOYO 47260 NACHI 51105 Fersa 629-2RS NTN K45X63X51.8 NTN RNA4913S ISO UCTX12 FAF 7306BG New Departure W5202-2RS SKF S71920 ACB/P4A NOK SB 115 145 14 FKM
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