 
| Dimensions (metric) | d | 20 |  With Inner Race & One Seal RS | 
| D | 37 | ||
| B | 17 | ||
| B1 | 18 | ||
| Approx. Wgt. lbs | .190 | ||
| Interchange | FAG | NA 4904 RSR | |
| INA | NA 4904 RSR | ||
| SKF | - | ||
| Torrington | NA 4904 RS | ||
| Model No. | Inner Diameter | Outer Diameter | Width | Brand | Type | 
| 31310A | 50 | 110 | 29,25 | SNR | Tapered Roller Bearings | 
|---|---|---|---|---|---|
| 7813CDB | 65 | 85 | 10 | CYSD | Angular Contact Ball Bearings | 
| 6205/HR11TN | 52 | 25 | 15 | SKF | Deep Groove Ball Bearings | 
| 6303ZE | 17 | 47 | 14 | NACHI | Deep Groove Ball Bearings | 
| 6307NRZZ | 35,000 | 80,000 | 21,000 | SNR | Deep Groove Ball Bearings | 
| 9102KDDG | 15 | 32 | 9 | Timken | Deep Groove Ball Bearings | 
| BHM2515 | 25 | 33 | 15 | KOYO | Needle Roller Bearings | 
| K58x64x19 | 58 | 64 | 19 | ISO | Needle Roller Bearings | 
| GYA108RRB | 38,1 | 80 | 39,3 | Timken | Deep Groove Ball Bearings | 
| NU 352 | 260 | 540 | 102 | NACHI | Cylindrical Roller Bearings | 
| UCP319 | 95 | 103 | KOYO | Bearing Units | |
| L15TA404 | 4.2500 | 5.2500 | .5000 | FAG | ANGULAR CONTACT BALL BEARINGS | 
| L10WA2000 | 20.0000 | 22.0000 | 1.0000 | FAG | DEEP GROOVE BALL BEARINGS | 
| RNAF16x24x20 | 24 | 20 | FAG (Old No.) | NEEDLE BEARINGS | |
| MRJA33/8 | 3.3750 | 7.5000 | 1.5625 | RHP | CYLINDRICAL ROLLER BEARINGS | 
| 6312NR | 60 | 130 | 31 | CONSOLIDATED | DEEP GROOVE BALL BEARINGS | 
| HJ-2312E | 60 | 9 | CONSOLIDATED | CYLINDRICAL ROLLER BEARINGS | |
| CRHSB-112 | 3.5000 | 7.0000 | 3.7500 | CONSOLIDATED | NEEDLE BEARINGS | 
| NCF-2968V | 340 | 460 | 72 | CONSOLIDATED | CYLINDRICAL ROLLER BEARINGS | 
| HC7021TGP/4 | 105 | 160 | 26 | CONSOLIDATED | ANGULAR CONTACT BALL BEARINGS | 
Hot number:NSK 110PCR2303 ISB 23960 K ISB 61884 MA CYSD 6816-ZZ NTN BK1712 SKF FY 5/8 FM KOYO N304 ISO NH334 AST NJ2217 EM NTN NN30/800KWD1CS140P5 SKF NU 211 ECP KOYO NUP312 FAG 3306B.2Z STEYR NJ310 CONSOLIDATED 6411-2RS Gamet 101041X/101080P ISB 23134 K NSK 240/1060CAK30E4 Timken 24172YMB SKF 32920/Q NSK 52204 ISO 7015 ADT NSK B15-85DD SKF BT4-0012 G/HA1C500VA901 Timken DL 22 16 Timken H-1685-C FAG HCB71902-C-T-P4S NBS SCW 40 AS SKF SNW3124x110 RMB RK3010X
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