Aetna

Prefix	Suffix	Definition
A		SPECIAL.
AG		SPECIAL AGRICULTURAL BEARING.
B		ONE DIRECTION BALL THRUST BEARING, FLAT SEAT, FLAT RACEWAY,BRONZE RETAINER, INCH STANDARD, LIGHT SERIES.
B		BRONZE CAGE WHEN THE CAGE RETAINS THE ROLLERS IN THE INNER RING IF THE OUTER RING IS REMOVED.
C		ONE DIRECTION BALL THRUST BEARING WITH FLAT SEAT, FLAT RACEWAY, PRESSED STEEL RETAINER, INCH STANDARD, LIGHT SERIES.
E		ONE DIRECTION BANDED BALL THRUST BEARING WITH FLAT SEAT, GROOVED RACEWAY AND FULL COMPLEMENT OF BALLS, INCH STANDARD, MEDIUM SERIES.
F		ONE DIRECTION BALL THRUST BEARING WITH FLAT SEAT, GROOVED RACEWAY, PRESSED STEEL RETAINER, INCH STANDARD, LIGHT SERIES.
G		ONE DIRECTION BALL THRUST BEARING WITH FLAT SEAT, GROOVED RACEWAY, PRESSED TEEL RETAINER, INCH STANDARD MEDIUM SERIES.
K		TWO LIP INNER RING.
L		CYLINDRICAL INNER RING (NO LIPS).
M		ONE LIP INNER RING.
N		ONE LIP INNER RING WITH ONE ROLLER RETAINMENT RING.
P		CYLINDRICAL INNER RING WITH TWO ROLLER RETAINMENT RINGS.
R		ONE PIECE, CHANNEL TYPE, BALL RETAINER.
R		STEEL CAGE WHEN THE CAGE RETAINS THE ROLLERS IN THE INNER RING IF THE OUTER RING IS REMOVED.
T		NON-STANDARD INNER RING WIDTH.
U		NON-STANDARD FILLET RADII ON INNER RING.
W		PLAIN THRUST WASHER.
X		BORE SMALLER THAN STANDARD.
Z		BORE LARGER THAN STANDARD.
	B	BRONZE CAGE WHEN THE CAGE RETAINS THE ROLLERS IN THE OUTER RING IF THE INNER RING IS REMOVED.
	K	TWO LIP OUTER RING.
	L	CYLINDRICAL OUTER RING (NO LIPS).
	M	ONE LIP OUTER RING.
	N	ONE LIP OUTER RING WITH ONE ROLLER RETAINMENT RING.
	P	CYLINDRICAL OUTER RING WITH TWO ROLLER RETAINMENT RINGS.
	R	STEEL CAGE WHEN THE CAGE RETAINS THE ROLLERS IN THE OUTER RING IF THE OUTER RING IS REMOVED.
	T	NON-STANDARD OUTER RING WIDTH.
	U	NON-STANDARD FILLET RADII ON OUTER RING.
	X	OUTSIDE DIAMETER SMALLER THAN STANDARD.
	Y	THIS LETTER IS SUED AS A SPARE FOR TH POSSIBILITY OF HAVING TWO SIZES UNDER STANDARD SIZE IN ONE NUMBER OR VICE VERSA.
	Z	OUTSIDE DIAMETER LARGER THAN STANDARD.