| Prefix | Suffix | Definition |
| . | (0) | AFBMA RANGE 0 |
| . | (2) | AFBMA RANGE 2 |
| . | (3) | AFBMA. RANGE 3 |
| . | (4) | AFBMA RANGE 4 |
| . | DB | BACK-TO-BACK MOUNTING |
| . | DF | FACE-TO-FACE MOUNTING |
| . | DT | TANDEM MOUNTING |
| . | DU | UNIVERSAL DUPLEX |
| . | LD | NO LUBRICATION OR DRY BEARINGS |
| . | LG | GREASE LUBRICATION |
| . | LGP | GREASE PLATED |
| . | LO | OIL LUBRICATION |
| . | LOG | OIL LUBRICATION AND THE BEARING CENTRIFUGED |
| . | LOV | OIL VACUUM IMPREGNATED INTO THE RETAINER |
| . | LOVC | OIL VACUUM IMPREGNATED INTO THE RETAINER AND CENTRIFUGED TO REMOVE EXCESS |
| . | LY | OTHER MPB-APPROVED LUBRICANTS |
| . | P | PRECISION |
| . | P3 | ABEC-3, KBEC-3 |
| . | P5 | ABEC-5, RBEC-5 |
| . | P7 | ABEC-7, RBEC-7 |
| . | PI | ABEC-1, RBEC-1 |
| . | S | INDUSTRIAL QUALITY |
| . | SU | SUPER ULTRA-PRECISION (ABEC-7P OR -7T) |
| . | U | ULTRA-PRECISION (ABEC-5P OR -5T) |
| 3 | . | SPECIAL MATERIAL 440C |
| 5 | . | SPECIAL MATERIAL M50 PRIMARY LEVEL PREFIXES (BEARING TYPE) |
| A | . | ALTERNATE UNDERSIZE BALL SPACERS |
| B | . | MACHINED BRONZE RETAINER |
| D | . | COMMERCIAL QUALITY INCH DIMENSION DOUBLE-ROW THIN SECTION BALL BEARING |
| DD | . | MOLDED LIP SHIELDS |
| F | . | FULL BALL COMPLEMENT |
| H | . | METRIC DIMENSION PRECISION BALL BEARINGS |
| H | . | MACHINED STEEL |
| HA OR HAD | . | ANGULAR CONTACT |
| HD | . | DEEP GROOVE, FRACTURED RACE |
| HK OR HKD | . | CONRAD |
| HT | . | TWO PIECE INNER |
| L | . | TEFLON TUBE SPACERS |
| LL | . | LOW TORQUE LABYRINTH SEAL |
| M | . | MOLDED PLASTIC RETAINER |
| O | . | TEFLON 0-RING SPACERS |
| P | . | SPRING SPACERS |
| R | . | METRIC DIMENSION PRECISION ROLLER BEARINGS |
| R | . | MACHINED PHENOLIC RETAINER |
| RAA | . | 1 GUIDE FLANGE ON INNER RACE 1 GUIDE FLANGE ON OUTER RACE |
| RF | . | 2 GUIDE FLANGES ON INNER RACE 1 GUIDE FLANGE ON OUTER RACE |
| RJ | . | 1 GUIDE FLANGE ON INNER RACE 2 GUIDE FLANGES ON OUTER RACE |
| RN | . | * 2 GUIDE FLANGES ON INNER RACE 0 GUIDE FLANGES ON OUTER RACE |
| RNH | . | 2 GUIDE FLANGES ON INNER RACE, NO OUTER |
| ROO | . | RETAINER AND ROLLER SET ONLY |
| RU | . | 0 GUIDE FLANGES ON INNER RACE 2 GUIDE FLANGES ON OUTER RACE |
| RUS | . | 2 GUIDE FLANGES ON OUTER RACE, NO INNER |
| RY | . | RY WITH SNAP RING RETENTION |
| S | . | COMMERCIAL QUALITY INCH DIMENSION SINGLE-ROW THIN SECONDARY LEVEL PREFIXES (SEPARATORS) SECTION BALL BEARING |
| S | . | STAMPED STEEL ONE PIECE RETAINER |
| S | . | SINGLE SHIELD |
| SS | . | DOUBLE SHIELD |
| T | . | INCH DIMENSION, INSTRUMENT PRECISION OR AIRFRAME SERIES+C982 SERIES |
| T | . | STAMPED RIBBON RETAINER |
| TA | . | THIN SECTION, ANGULAR CONTACT, EQUAL WIDTH INNER AND OUTER RACE |
| TAG | . | THIN SECTION, ANGULAR CONTACT, EXTENDED INNER RACE |
| TC | . | THIN SECTION, SINGLE FRACTURED OUTER RACE, EXTENDED INNER RACE |
| TCN | . | THIN SECTION, SINGLE FRACTURED OUTER RACE, EQUAL RACE WIDTH INNER AND OUTER |
| TK | . | THIN SECTION, CONRAD, EQUAL NARROW WIDTH RACES |
| TKC | . | THIN SECTION, CONRAD, EXTENDED INNER RACE |
| TKE | . | THIN SECTION, CONRAD, EQUAL WIDE WIDTH RACES |
| TON | . | THIN SECTION, SINGLE FRACTURED, INTEGRAL SHIELDS, AND OUTER RACE EQUAL WIDTH INNER |
| TW | . | THIN SECTION, SINGLE FRACTURED, INTEGRAL SHIELDS, EXTENDED INNER RACE |
| Z | . | SILICON-IRON-BRONZE RETAINER |
| Z | . | SINGLE SEAL |
| ZZ | . | DOUBLE SEAL |
