| Old No. | R-4 | ![]() Open | |
| Dimensions (metric) | d | 4 | |
| D | 16 | ||
| B | 5 | ||
| Approx. Wgt. lbs | .0120 | ||
| Interchange | ADR | 634 | |
| ISC | 634 | ||
| Nachi | 634 | ||
| NMB | R-1640 | ||
| NTN | 634 | ||
| RMB | R4160 | ||
| SKF | 634 | ||
| 1) Also available in ABEC #3, #5 and #7 precision. Consult factory for availability. | |||
Hot number:RIV NU 318 TIMKEN 67983/67920CD NKE 31315 NKE 6010 IKO NAU 4916 CYSD NUP411 NTN SF4814 KOYO UKF215 New Departure 6310-Z Hyatt 98848 IPTCI TPSY-35SD MRC 7422-D SKF 38730 SKF KRV 26 B KOYO 6032-RS
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