AT21128 — BEARING,SLEEVE

✓ Government record, cited

— · BALL BEARING

PRODUCT OVERVIEW

AT21128: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY INNER LAYER, corner_shape: SQUARE ALL CORNERS, overall_length: 1.1860 INCHES NOMINAL IN, special_features: 0.0300 IN. UNDERSIZE BORE; LUBRICATION PROVISIONS TO MEET ENGINE MANUFACTURERS SPECIFICATIONS IN, style_designator: SEGMENTED, PLAIN, NO OUTSIDE FLANGES, surface_treatment: TIN OVERALL.

This part is cataloged in the U.S. Government catalog under NSN 3120-01-119-8992, indicating validated use in U.S. government and defense logistics supply chains.

Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

AT21128

NSN: 3120-01-119-8992
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 75160 — DEERE & CO (USA)

SPECIFICATIONS

material	ALUMINUM ALLOY INNER LAYER
corner_shape	SQUARE ALL CORNERS
overall_length	1.1860 INCHES NOMINAL IN
special_features	0.0300 IN. UNDERSIZE BORE; LUBRICATION PROVISIONS TO MEET ENGINE MANUFACTURERS SPECIFICATIONS IN
style_designator	SEGMENTED, PLAIN, NO OUTSIDE FLANGES
surface_treatment	TIN OVERALL
body_inside_diameter	2.7200 INCHES NOMINAL IN
body_outside_diameter	2.9005 INCHES NOMINAL IN
NSN	3120-01-119-8992

COMPONENT DIAGRAM

KEY FEATURES

•

CORNER SHAPE: SQUARE ALL CORNERS

•

BODY OUTSIDE DIAMETER: 2.9005 INCHES NOMINAL IN

•

STYLE DESIGNATOR: SEGMENTED, PLAIN, NO OUTSIDE FLANGES

•

BODY INSIDE DIAMETER: 2.7200 INCHES NOMINAL IN

•

SURFACE TREATMENT: TIN OVERALL

•

MATERIAL: ALUMINUM ALLOY INNER LAYER

TECHNICAL CHARACTERISTICS

CORNER SHAPE	SQUARE ALL CORNERS
BODY OUTSIDE DIAMETER	2.9005 INCHES NOMINAL IN
STYLE DESIGNATOR	SEGMENTED, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH	1.1860 INCHES NOMINAL IN
BODY INSIDE DIAMETER	2.7200 INCHES NOMINAL IN
SPECIAL FEATURES	0.0300 IN. UNDERSIZE BORE; LUBRICATION PROVISIONS TO MEET ENGINE MANUFACTURERS SPECIFICATIONS IN
SURFACE TREATMENT	TIN OVERALL
MATERIAL	ALUMINUM ALLOY INNER LAYER
MATERIAL	STEEL OUTER LAYER

OTHER ITEMS IN FSC 3120 — Bearings, Plain, Unmounted

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

3120-00-001-1288 3120-00-001-1835 3120-00-001-1838 3120-00-001-1928 3120-00-001-1934 3120-00-001-3933 3120-00-001-3937 3120-00-001-3938

SUBSTITUTES & CROSS-REFERENCES 1

3325AP-30Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is AT21128?

AT21128 is a BEARING,SLEEVE.

What parts can replace AT21128?

There is 1 known substitute for AT21128: 3325AP-30. Substitute compatibility should be verified for your specific system.

What is the NSN for AT21128?

AT21128 is cataloged in the U.S. Government catalog under NSN 3120-01-119-8992. This indicates validated use in U.S. government and defense supply chains.

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AT21128 — BEARING,SLEEVE

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