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2120741 — 2120741

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

2120741: 2120741.

The 2120741 is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 937 OVERALL, corner_shape: SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER, flange_width: 0.0500 INCHES MINIMUM AND 0.0550 INCHES MAXIMUM IN, overall_length: 0.2650 INCHES MINIMUM AND 0.2700 INCHES MAXIMUM IN, keyway_dimension: 0.0650 INCHES MINIMUM AND 0.0700 INCHES MAXIMUM INTERNAL KEYWAY WIDTH IN, special_features: FRICTION RING R740BF CEMENTED TO RIGHT END SURFACE OF LEFT FLANGE. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-409-9547, 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
2120741
NSN: 3120-00-409-9547
NIINs: 004099547, 008306840
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 99193 — HONEYWELL INTERNATIONAL INC. DBA HONEYWELL INTERNATIONAL DIV AEROSPACE - PHOENIX (USA)
SPECIFICATIONS
materialCOPPER ALLOY 937 OVERALL
corner_shapeSQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
flange_width0.0500 INCHES MINIMUM AND 0.0550 INCHES MAXIMUM IN
overall_length0.2650 INCHES MINIMUM AND 0.2700 INCHES MAXIMUM IN
keyway_dimension0.0650 INCHES MINIMUM AND 0.0700 INCHES MAXIMUM INTERNAL KEYWAY WIDTH IN
special_featuresFRICTION RING R740BF CEMENTED TO RIGHT END SURFACE OF LEFT FLANGE
style_designatorSOLID, EXTERNAL FLANGE ONE END
body_inside_diameter0.3134 INCHES MINIMUM AND 0.3140 INCHES MAXIMUM IN
body_outside_diameter0.5293 INCHES MINIMUM AND 0.5297 INCHES MAXIMUM IN
flange_outside_diameter0.6900 INCHES NOMINAL IN
material_document_and_classificationAMS 4842 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN3120-00-409-9547
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 2120741 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CORNER SHAPE: SQUARE INSIDE RIGHT CORNER
•
FLANGE OUTSIDE DIAMETER: 0.6900 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 0.5293 INCHES MINIMUM AND 0.5297 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPESQUARE LEFT FLANGE BODY CORNER
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE INSIDE LEFT CORNER
FLANGE OUTSIDE DIAMETER0.6900 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.5293 INCHES MINIMUM AND 0.5297 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 4842 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 2120741?
2120741 is a 2120741.
What is the NSN for 2120741?
2120741 is cataloged in the U.S. Government catalog under NSN 3120-00-409-9547. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.