| Dimensions (metric) | d | 4 | ![]() Two Shields ZZ |
| D | 9 | ||
| B | 4 | ||
| Approx. Wgt. lbs | .0030 | ||
| Interchange | ADR | - | |
| ISC | 684hZZS | ||
| NMB | SSL-940ZZ | ||
| NTN | FW684ZZA | ||
| RMB | - | ||
| SKF | W638/4-ZZ | ||
| 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. 3) Shields are manufactured from 304 or equivalent stainless steel. | |||
Hot number:NACHI 7036 AC/DB SNR 3212 A-RS FAG HCS71922C.T.P4S.UL INA PWKRE 40.2RS INA NUKRE 52 OKB 218K NTN 6326ZZ CX N309 E KOYO RV253733 NTN SX05A52 NBS SL192309 Timken X33021/Y33021 ISB YRT 580 KAYDON KB-35CPO NOK SC 38 58 11 ACM
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