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523-5256781 DETAIL 7-C — BUSHING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

523-5256781 DETAIL 7-C: BUSHING,SLEEVE.

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 934 OVERALL, corner_shape: SQUARE ALL CORNERS, overall_length: 2.0000 INCHES NOMINAL IN, surface_finish: 63.0 MICROINCHES OVERALL, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 2.3750 INCHES MINIMUM AND 2.3760 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-159-1310, 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
523-5256781 DETAIL 7-C
NSN: 3120-01-159-1310
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY 934 OVERALL
corner_shapeSQUARE ALL CORNERS
overall_length2.0000 INCHES NOMINAL IN
surface_finish63.0 MICROINCHES OVERALL
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter2.3750 INCHES MINIMUM AND 2.3760 INCHES MAXIMUM IN
body_outside_diameter2.8750 INCHES NOMINAL IN
material_document_and_classificationQQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN3120-01-159-1310
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 523-5256781 DETAIL 7-C · 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
•
SURFACE FINISH: 63.0 MICROINCHES OVERALL
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY OUTSIDE DIAMETER: 2.8750 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 2.3750 INCHES MINIMUM AND 2.3760 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY 934 OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES OVERALL
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER2.8750 INCHES NOMINAL IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH2.0000 INCHES NOMINAL IN
BODY INSIDE DIAMETER2.3750 INCHES MINIMUM AND 2.3760 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY 934 OVERALL
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 2
5256781-14Reference document
Same NSN cross-reference
Reference document — Secondary reference
523-526781 PIECE 14Same 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 523-5256781 DETAIL 7-C?
523-5256781 DETAIL 7-C is a BUSHING,SLEEVE.
What parts can replace 523-5256781 DETAIL 7-C?
There are 2 known substitutes for 523-5256781 DETAIL 7-C: 5256781-14, 523-526781 PIECE 14. Substitute compatibility should be verified for your specific system.
What is the NSN for 523-5256781 DETAIL 7-C?
523-5256781 DETAIL 7-C is cataloged in the U.S. Government catalog under NSN 3120-01-159-1310. 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.