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20487-3 — BEARING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

20487-3: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024, corner_shape: SQUARE LEFT FLANGE BODY CORNER, flange_width: 0.1250 INCHES NOMINAL IN, overall_length: 1.3750 INCHES NOMINAL IN, inside_diameter: 1.830 INCHES MINIMUM AND 1.835 INCHES MAXIMUM IN, outside_diameter: 2.130 INCHES MINIMUM AND 2.140 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-313-8632, 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
20487-3
NSN: 3120-01-313-8632
NIINs: 013138632, 013456598
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 07070 — UNITED STATES DEPARTMENT OF THE NAVY DBA NAVAL SURFACE WARFARE CENTER PANAMA CITY (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024
corner_shapeSQUARE LEFT FLANGE BODY CORNER
flange_width0.1250 INCHES NOMINAL IN
overall_length1.3750 INCHES NOMINAL IN
inside_diameter1.830 INCHES MINIMUM AND 1.835 INCHES MAXIMUM IN
outside_diameter2.130 INCHES MINIMUM AND 2.140 INCHES MAXIMUM IN
special_featuresDISTANCE FROM CENTER OF INSIDE DIA TO FLATTED SIDE 0.978 IN. IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
overall_thickness0.018 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN
surface_treatmentANODIZE
body_inside_diameter1.2300 INCHES NOMINAL IN
body_outside_diameter1.5000 INCHES NOMINAL IN
NSN3120-01-313-8632
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 20487-3 · 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 LEFT FLANGE BODY CORNER
•
FLANGE OUTSIDE DIAMETER: 1.7500 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 1.5000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
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
CORNER SHAPEROUND INSIDE RIGHT CORNER
FLANGE OUTSIDE DIAMETER1.7500 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER1.5000 INCHES NOMINAL IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-5687,TY 1,GR 1 MIL SPEC 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 20487-3?
20487-3 is a BEARING,SLEEVE.
What is the NSN for 20487-3?
20487-3 is cataloged in the U.S. Government catalog under NSN 3120-01-313-8632. 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.