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Technical Data Sheet
PartsTable / COMPONENT / 3120-2-ST6
3120-2-ST6 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 842 OVERALL, corner_shape: CHAMFERED INSIDE RIGHT CORNER, flange_width: 0.2187 INCHES NOMINAL IN, overall_length: 2.2500 INCHES NOMINAL IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, body_inside_diameter: 2.6250 INCHES MINIMUM AND 2.6255 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-528-5112, 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
3120-2-ST6
NSN: 3120-00-528-5112
FSC: 3120
CAGE: 14153 — DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA (USA)
SPECIFICATIONS
materialCOPPER ALLOY 842 OVERALL
corner_shapeCHAMFERED INSIDE RIGHT CORNER
flange_width0.2187 INCHES NOMINAL IN
overall_length2.2500 INCHES NOMINAL IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
body_inside_diameter2.6250 INCHES MINIMUM AND 2.6255 INCHES MAXIMUM IN
body_outside_diameter3.0000 INCHES MINIMUM AND 3.0010 INCHES MAXIMUM IN
flange_outside_diameter3.4940 INCHES MINIMUM AND 3.4980 INCHES MAXIMUM IN
material_document_and_classificationMIL-B-16541 GR A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN3120-00-528-5112
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 3120-2-ST6 · 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
•
FLANGE WIDTH: 0.2187 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 2.6250 INCHES MINIMUM AND 2.6255 INCHES MAXIMUM IN
•
CORNER SHAPE: SQUARE OUTSIDE RIGHT CORNER
•
FLANGE OUTSIDE DIAMETER: 3.4940 INCHES MINIMUM AND 3.4980 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 3.0000 INCHES MINIMUM AND 3.0010 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, EXTERNAL FLANGE ONE END
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE WIDTH0.2187 INCHES NOMINAL IN
BODY INSIDE DIAMETER2.6250 INCHES MINIMUM AND 2.6255 INCHES MAXIMUM IN
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
FLANGE OUTSIDE DIAMETER3.4940 INCHES MINIMUM AND 3.4980 INCHES MAXIMUM IN
CORNER SHAPESQUARE LEFT FLANGE BODY CORNER
BODY OUTSIDE DIAMETER3.0000 INCHES MINIMUM AND 3.0010 INCHES MAXIMUM IN
OVERALL LENGTH2.2500 INCHES NOMINAL IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPECHAMFERED INSIDE RIGHT CORNER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
C589AInterchangeable
interchangeable cross-reference
interchangeable
27134Interchangeable
interchangeable cross-reference
interchangeable
66787Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3120-2-ST6?
3120-2-ST6 is a BUSHING,SLEEVE.
What parts can replace 3120-2-ST6?
There are 3 known substitutes for 3120-2-ST6: C589A, 27134, 66787. Substitute compatibility should be verified for your specific system.
What is the NSN for 3120-2-ST6?
3120-2-ST6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-528-5112. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026