... Shield/closure: open bearing, Z, ZZ, RS, 2RS2) Snap ring: N, NR3) Tolerance codes: ABEC-1)2- 6000 ... Shield/closure: open bearing, Z, ZZ, RS, 2RS2) Snap ring: N, NR3) Tolerance codes: ABEC-1)3- 6200 ... Shield/closure: open bearing, Z, ZZ, RS, 2RS2) Snap ring: N, NR3) Tolerance codes: ABEC-1)4- 6300 ... Z, ZZ, RS, 2RS2) Snap ring: N, NR3) Tolerance codes: ABEC-1)FEATURES OF ROLLER BEARINGS:30202 - 30230 30302 - ...