| Prefix | Suffix | Definition |
| . | -A | CONE AND CUP: EXTRA PART NUMBER. 6A, 359-A, 15250-A, ETC. |
| . | -A | CAGE: TYPE A STEERING GEAR BEARING CAGE. 5A, 11A, ETC. SUPERSEDED BY TYPE BA. |
| . | -AB | CUP: FLANGED CUP. |
| . | -AC | CUP: EXTRA PART NUMBER. |
| . | -AD | CUP: DOUBLE CUP. |
| . | -AS | CONE AND CUP: EXTRA PART NUMBER. |
| . | -AW | CONE: SLOTTED OR KEYWAY CONE. |
| . | -AX | CONE AND CUP: EXTRA PART NUMBER. 14138-AX-LAPPED FRONT FACE. |
| . | -B | CUP: FLANGED CUP. |
| . | -BA | CAGE: TYPE BA STEERING GEAR BEARING CAGE. 5BA, 11BA, ETC. (CONICAL HEAD ROLLERS.) |
| . | -BC | CAGE: TYPE BC STEERING GEAR BEARING CAGE. SBC, 11BC, ETC. (FLAT HEAD ROLLERS.) . NOTE : TYPES BC AND BA ARE NOT INTERCHANGEABLE . |
| . | -BS | CUP: FLANGED CUP. |
| . | -BW | CUP: FLANGED CUP WITH SLOT OR KEYWAY. |
| . | -BX | CUP: FLANGED CUP. |
| . | -C | CONE AND CUP: EXTRA PART NUMBER. 453-C. |
| . | -C | CAGE: TYPE C STEERING, GEAR BEARING CAGE. 5C, 11C, ETC. SUPERSEDED, BY TYPE BC. |
| . | -CA | CONE: RELIEF GROOVE IN BACKFACE OR EXTRA PART NUMBER. 4CA |
| . | -CB | CONE: RELIEF GROOVE IN BACKFACE FRONT FACE OR EXTRA PART NUMBER. 4CB. |
| . | -CC | CONE: RELIEF GROOVE IN BOTH FACES. |
| . | -CE | CUP: EXTRA PART NUMBER. 6CE, 14CE. |
| . | -CP | CONE AND CUP: CHROME PLATED CONE OR CUP. |
| . | -CS | CONE AND CUP: EXTRA PART NUMBER.13CS, 394-CS. |
| . | -D | CONE: DOUBLE CONE. |
| . | -D | CUP: DOUBLE CUP. |
| . | -DA | CONE: EXTRA PART NUMBER. |
| . | -DB | CUP: FLANGED DOUBLE CUP. |
| . | -DD | CONE: EXTRA LONG DOUBLE CONE. |
| . | -DE | CONE: DOUBLE CONE. |
| . | -DS | CUP: DOUBLE CUP WITH CROWNED O.D. |
| . | -DW | CUP: SLOT OR KEYWAY IN DOUBLE CUP . |
| . | -DW | CONE: SLOT OR KEYWAY IN DOUBLE CONE. |
| . | -E | CONE AND CUP: EXTRA PART NUMBER. |
| . | -ED | CUP: DOUBLE CUP. |
| . | -F | CONE: EXTRA PART NUMBER. |
| . | -KB | CUP: SNAP RING GROOVE IN O.D. |
| . | -NX | CONE: LAPPED FRONT FACE. |
| . | -R | CONE AND CUP: EXTRA PART NUMBER. SPECIAL RADIUS. 415-R, 3420-R. |
| . | -S | CONE: SLOTTED OR KEYWAY CONE. |
| . | -S | CONE AND CUP: EXTRA PART NUMBER. |
| . | -SA | CONE AND CUP: EXTRA PART NUMBER. |
| . | -SB | CUP: FLANGED CUP. |
| . | -SD | CUP: DOUBLE CUP. |
| . | -SP | CUP: EXTRA PART NUMBER. |
| . | -SR | CONE AND CUP: EXTRA PART NUMBER. |
| . | -SW | CONE: SLOTTED OR KEYWAY CONE. |
| . | -SX | CONE AND CUP: EXTRA PART NUMBER. |
| . | -T | CUP: TAPPERED O.D. |
| . | -T | CONE: TAPPERED BORE. |
| . | -TD | CONE: DOUBLE CONE WITH TAPPERED BORE. |
| . | -U | CONE: SPECIAL UNDERSIZE BORE. |
| . | -W | CONE AND CUP: SLOT OR KEYWAY IN OR CUP. |
| . | -X | CONE AND CUP: EXTRA PART NUMBER. |
| . | -X | CONE: SLOTTED OR KEYWAY CONE. |
| . | -XA | CUP: EXTRA PART NUMBER. |
| . | -XD | CONE: DOUBLE CONE. |
| . | -XW | CONE: SLOTTED OR KEYWAY CONE. |
| A | . | CONE AND CUP: APPLIES TO CERTAIN SERIES AND THEIR CONE AND CUP NUMBERS. A4000, A4057, ETC. A6000, A6157, ETC. |
| EE | . | CONE: SPECIAL CONE DESIGN. NOT TO BE INTERCHANGED WITH PART IT SUPERSEDES. |
| NA | . | CONE: FACTORY ADJUSTED CONE (TWO USED WITH D CUP) . |
| X | . | CONE AND CUP: EXPERIMENTAL PART. |
