| Prefix | Suffix | Definition |
| . | (DB) | BALL BEARING SUITABLE FOR DUPLEX MOUNTING "BACK-TO-BACK". |
| . | (DF) | BALL BEARING SUITABLE FOR DUPLEX MOUNTING "FACE-TO-FACE". |
| . | (DR) | CYLINDRICAL ROLLER BEARING DROP ROLLER RETAINER DESIGN. |
| . | (DT) | BALL BEARING SUITABLE FOR DUPLEX MOUNTING IN TANDEM. |
| . | (RY) | TRACTION MOTOR BEARING SPECIFICATION. |
| . | (S...) | (FOILED BY 3 DIGITS OR ONE LETTER AND TWO DIGITS) SPECIAL SPECIFICATION COVERING SELECTED AND/OR OTHER CHARACTERISTICS. |
| . | (X) | BEARING WITH INCREASED SEAL TORQUE. |
| . | (Y) | BEARING WITH REDUCED SEAL TORQUE |
| . | 22 | TWO METAL SHIELDS. |
| . | 2HS | TWO SEALS, POLYACRYLIC MATERIAL. |
| . | 2RS | TWO SEALS, BUNA-N RUBBER. |
| . | 2RSR | TWO SEAL, BUNA-N RUBBER, RADIAL TYPE. |
| . | 2TS | TWO SEALS, FIBER GLASS FILLED TEFLON MATERIAL. |
| . | 2VS | TWO SEALS, VITON® MATERIAL. |
| . | 2ZR | TWO METAL SHIELDS, RADIAL TYPE. |
| . | A | BALL BEARING, SINGLE-ROW, ANGULAR CONTACT 30 DEGREES. |
| . | A | INTERNAL DESIGN MODIFICATION. |
| . | B | BALL BEARING, SINGLE-ROW, ANGULAR CONTACT 40 DEGREES. |
| . | B | INTERNAL DESIGN MODIFICATION. |
| . | C | BALL BEARING, SINGLE-ROW ANGULAR CONTACT 15 DEGREES. |
| . | C | INTERNAL DESIGN MODIFICATION. |
| . | C2 | INTERNAL RADIAL CLEARANCE DESIGNATIONS CONFORMING TO AFBMA STANDARDS, SECTION NO. 3. |
| . | C3 | INTERNAL RADIAL CLEARANCE DESIGNATIONS CONFORMING TO AFBMA STANDARDS, SECTION NO. 3. |
| . | C4 | INTERNAL RADIAL CLEARANCE DESIGNATIONS CONFORMING TO AFBMA STANDARDS, SECTION NO. 3. |
| . | C5 | INTERNAL RADIAL CLEARANCE DESIGNATIONS CONFORMING TO AFBMA STANDARDS, SECTION NO. 3. |
| . | CL | INTERNAL RADIAL CLEARANCE DESIGNATIONS CONFORMING TO AFBMA STANDARDS, SECTION NO. 3. |
| . | DA | BALL BEARING, DOUBLE-ROW WITH SPLIT INNER RING. N |
| . | E | BALL BEARING, SINGLE-ROW, ANGULAR CONTACT 25 DEGREES. |
| . | E | BALL OR ROLLER BEARING WITH INCREASED LOAD CAPACITY DESIGN. |
| . | F | MACHINED STEEL RETAINER, ROLLING ELEMENT GUIDED. |
| . | F3 | NOISE TEST SPECIFICATION. |
| . | F96 | AIRCRAFT INSPECTION. |
| . | FA | MACHINE STEEL RETAINER, OUTER RING GUIDED. |
| . | FB | MACHINED STEEL RETAINER, INNER RING GUIDED. |
| . | G | NOISE TEST SPECIFICATION. |
| . | H | MACHINED FORGED BRONZE RETAINER, ROLLING ELEMENT GUIDED. |
| . | HA | MACHINED FORGED BRONZE RETAINER, OUTER RING GUIDED. |
| . | HB | MACHINED FORGED BRONZE RETAINER, INNER RING GUIDED. |
| . | HL | SPHERICAL ROLLER BEARING WITH INCREASED LOAD CAPACITY. |
| . | HS | ONE SEAL, POLYACRYLIC MATERIAL. |
| . | J | STAMPED METAL RETAINER, ROLLING ELEMENT GUIDED. |
| . | K | BEARING WITH TAPERED BORE, TAPER 1:12. |
| . | K30 | BEARING WITH TAPERED BORE, TAPER 1:30. |
| . | L | MACHINED ALUMINUM RETAINER, ROLLING ELEMENT GUIDED. |
| . | L10 | SHELL ALVANIA NO. 2 GREASE, MIL-G-18709. |
| . | L12 | CHEVRON SRI NO. 2 GREASE, MIL-G-3545. |
| . | L14 | SHELL AEROSHELL 16 GREASE, MIL-G-25760. |
| . | L15 | SHELL AEROSHELL 7 GREASE, MIL-G-23827. |
| . | L16 | AMERICAN SUPERMIL ASU 31052, MIL-G-25013. |
| . | L19 | MOBIL OIL, MOBIL 28 GREASE, MIL-G-81322. |
| . | L904 | DIESTER INSTRUMENT OIL, MIL-L-6085. |
| . | L907 | DIESTER INSTRUMENT OIL, MIL-L-6085. |
| . | L909 | PETROLEUM OIL, MIL-L-7870A. |
| . | L910 | PETROLEUM OIL, MIL-L-644A. |
| . | L914 | PETROLEUM OIL, MIL-L-3503. |
| . | L923 | SILICONE FLUID. |
| . | LA | MACHINED ALUMINUM RETAINER, OUTER RING GUIDED. |
| . | LB | MACHINED ALUMINUM RETAINER, INNER RING GUIDED. |
| . | M | MACHINED BRASS RETAINER, ROLLING ELEMENT GUIDED. |
| . | MA | MACHINED BRASS RETAINER, OUTER RING GUIDED. |
| . | MB | MACHINED BRASS RETAINER, INNER RING GUIDED. |
| . | MP | MACHINED BRASS RETAINER, WINDOW TYPE. |
| . | N | CIRCUMFERENTIAL GROOVE ON BEARING O.D. FOR SNAP RING. |
| . | NR | CIRCUMFERENTIAL GROOVE ON BEARING O.D. AND SNAP RING. |
| . | P4 | ISO TOLERANCE CLASSIFICATION. |
| . | P5 | ISO TOLERANCE CLASSIFICATION. |
| . | P6 | ISO TOLERANCE CLASSIFICATION. |
| . | RS | ONE SEAL, BUNA-N RUBBER. |
| . | RSR | ONE SEAL, BUNA-N RUBBER, RADIAL TYPE. |
| . | S | SPHERICAL ROLLER BEARING WITH CIRCUMFERENTIAL LUBRICATING GROOVE'IN O.D. AND HOLES IN O.R. |
| . | S2 | STABILIZED FOR OPERATING TEMPERATURES UP TO 480°F. |
| . | S3 | STABILIZED FOR OPERATING TEMPERATURES UP TO 570°F. |
| . | S4 | STABILIZED FOR OPERATING TEMPERATURES UP TO 660°F. |
| . | SG | NOISE TESTED SPECIFICATION. |
| . | SI | STABILIZED FOR OPERATING TEMPERATURES UP TO 390°F. |
| . | SO | STABILIZED FOR OPERATING TEMPERATURES UP TO 300°F. |
| . | SOO | STABILIZED FOR OPERATING TEMPERATURES UP TO 250°F. |
| . | SP | SUPER PRECISION SPECIFICATION. |
| . | T | TEXTILE LAMINATED PHENOLIC RETAINER, ROLLING ELEMENT GUIDED. |
| . | T3 | ABEC-3 AND KBEC-3 TOLERANCES. |
| . | T5 | ABEC-5 AND RBEC-5 TOLERANCES. |
| . | T7 | ABEC-7 AND RBEC-7 TOLERANCES. |
| . | T9 | ABEC-9 AND RBEC-9 TOLERANCES. |
| . | TA | TEXTILE LAMINATED PHENOLIC RETAINER, OUTER RING GUIDED. |
| . | TH | TEXTILE LAMINATED PHENOLIC RETAINER, SNAP TYPE. |
| . | TN | PLASTIC RETAINER, ROLLING ELEMENT GUIDED. |
| . | TNH | PLASTIC RETAINER, SNAP TYPE. |
| . | TR | TEXTILE LAMINATED PHENOLIC RETAINER, INNER RING GUIDED. |
| . | TS | ONE SEAL, FIBER GLASS FILLED TEFLON MATERIAL. |
| . | UL | UNIVERSAL MOUNTING AND PRELOAD. |
| . | UM | SPECIFICATIONS FOR ANGULAR CONTACT. |
| . | UO | BALL BEARINGS. |
| . | V | FULL COMPLEMENT, RETAINERLESS BEARING. |
| . | VS | ONE SEAL, VITON® MATERIAL. |
| . | Y | PRESSED BRASS RETAINER, ROLLING ELEMENT GUIDED. |
| . | YP | PRESSED BRASS RETAINER; WINDOW TYPE. |
| . | Z | ONE METAL SHIELD. |
| . | ZR | ONE METAL SHIELD, RADIAL TYPE. |
| A | . | BALL BEARING, SINGLE-ROW, ANGULAR CONTACT TYPE WITH ONE RELIEVED INNER RING SHOULDER AND AN OUTER RING GUIDED RETAINER. |
| B | . | BALL BEARING, SINGLE-ROW, ANGULAR CONTACT TYPE WITH ONE RELIEVED OUTER RING SHOULDER AND AN INNER RING GUIDED RETAINER. |
| BO | . | MAGNETO TYPE BALL BEARING. |
| DL | . | BALL THRUST BEARING, SINGLE-ROW, SINGLE DIRECTION, GROOVED RACE SURFACE, METRIC LIGHT SERIES. |
| DM | . | BALL THRUST BEARING, SINGLE-ROW, SINGLE DIRECTION, GROOVED RACE SURFACE, METRIC MEDIUM SERIES. |
| E | . | MAGNETO TYPE BALL BEARING. |
| EW | . | BALL THRUST BEARING, SINGLE-ROW, SINGLE DIRECTION, GROOVED RACE SURFACE. EXTRA LIGHT INCH SERIES. |
| HW | . | BALL THRUST BEARING, SINGLE-ROW, SINGLE DIRECTION, GROOVED RACE SURFACE. HEAVY INCH SERIES. |
| K | . | AIRCRAFT CONTROL BALL BEARING, SINGLE-ROW, RADIAL. |
| KP | . | AIRCRAFT CONTROL BALL BEARING, SINGLE-ROW, RADIAL. |
| KS | . | AIRCRAFT CONTROL BALL BEARING, SINGLE-ROW, SELF-ALIGNING. |
| KSP | . | AIRCRAFT CONTROL BALL BEARING, SINGLE-ROW, SELF-ALIGNING. |
| L | . | MAGNETO TYPE BALL BEARING. |
| LS | . | BALL BEARING, SINGLE-ROW, LIGHT INCH SERIES. |
| M | . | MAGNETO TYPE BALL BEARING. |
| MS | . | BALL BEARING, SINGLE-ROW, MEDIUM INCH SERIES. |
| MW | . | BALL THRUST BEARING, SINGLE-ROW, SINGLE DIRECTION, GROOVED RACE SURFACE. MEDIUM INCH SERIES. |
| N | . | CYLINDRICAL ROLLER BEARING, SINGLE-ROW, TWO LIP INNER RING, CYLINDRICAL OUTER RING. |
| NJ | . | CYLINDRICAL ROLLER BEARING, SINGLE-ROW, TWO LIP OUTER RING, ONE LIP INNER RING. |
| NN | . | CYLINDRICAL ROLLER BEARING, DOUBLE-ROW, THREE LIP INNER RING, CYLINDRICAL OUTER RING, SPINDLE BEARING. |
| NNU | . | CYLINDRICAL ROLLER BEARING, DOUBLE-ROW, THREE LIP INNER RING, CYLINDRICAL INNER RING, SPINDLE BEARING. |
| NO | . | CYLINDRICAL ROLLER BEARING, SINGLE-ROW, TWO LIP OUTER RING, CYLINDRICAL INNER RING. |
| NUP | . | CYLINDRICAL ROLLER BEARING, SINGLE-ROW, TWO LIP OUTER RING, TWO LIP INNER RING WITH ONE LIP SEPARABLE. |
| QJ | . | BALL BEARING, SINGLE-ROW, FOUR-POINT DESIGN WITH SPLIT INNER RING. |
| R | . | BALL BEARING, SINGLE-ROW, EXTRA SMALL AND EXTRA LIGHT INCH SERIES. |
| RLS | . | CYLINDRICAL ROLLER BEARING, SINGLE-ROW, TWO LIP INNER RING, CYLINDRICAL OUTER RING, LIGHT INCH SERIES. |
| RMS | . | CYLINDRICAL ROLLER BEARING, SINGLE-ROW, TWO LIP INNER RING, CYLINDRICAL OUTER RING, MEDIUM INCH SERIES. |
| RY | . | TRACTION MOTOR BEARING SPECIFICATION. |
| S | . | BALL BEARING, SINGLE-ROW, EXTRA WIDE SERIES. |
| W | . | BALL THRUST BEARING, SINGLE-ROW. SINGLE DIRECTION, GROOVED RACE SURFACE. LIGHT INCH SERIES. |
| X | . | SPECIAL BEARINGS . |
| XA | . | SPECIAL BEARINGS . |
| XB | . | SPECIAL BEARINGS . |
| XF | . | SPECIAL BEARINGS . |
| XH | . | SPECIAL BEARINGS . |
| XJ | . | SPECIAL BEARINGS . |
| XK | . | SPECIAL BEARINGS . |
| XLS | . | BALL BEARING, SINGLE-ROW, EXTRA LIGHT SERIES. |
| XW | . | BALL THRUST BEARING, SINGLE-ROW. SINGLE DIRECTION, GROOVED RACE SURFACE. EXTRA LIGHT INCH SERIES. |
| £A | . | MAGNETO TYPE BALL BEARING. |