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A51B23527-39 — BUSHING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

A51B23527-39: BUSHING,SLEEVE.

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, corner_shape: SQUARE LEFT FLANGE BODY CORNER, flange_width: 0.0190 INCHES MINIMUM AND 0.0240 INCHES MAXIMUM IN, overall_length: 0.5450 INCHES MINIMUM AND 0.5550 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY, hardness_rating: 43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-031-3237, 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
A51B23527-39
NSN: 3120-01-031-3237
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
corner_shapeSQUARE LEFT FLANGE BODY CORNER
flange_width0.0190 INCHES MINIMUM AND 0.0240 INCHES MAXIMUM IN
overall_length0.5450 INCHES MINIMUM AND 0.5550 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
hardness_rating43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM OVERALL
style_designatorSOLID, EXTERNAL FLANGE ONE END
surface_treatmentPASSIVATE OVERALL
body_inside_diameter0.1975 INCHES MINIMUM AND 0.2005 INCHES MAXIMUM IN
body_outside_diameter0.3755 INCHES MINIMUM AND 0.3760 INCHES MAXIMUM IN
flange_outside_diameter0.4450 INCHES MINIMUM AND 0.4500 INCHES MAXIMUM IN
NSN3120-01-031-3237
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: A51B23527-39 · 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: 125.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
•
CORNER SHAPE: SQUARE INSIDE RIGHT CORNER
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
SURFACE FINISH63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
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 DIAMETER0.4450 INCHES MINIMUM AND 0.4500 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.3755 INCHES MINIMUM AND 0.3760 INCHES MAXIMUM IN
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51B23527-39?
A51B23527-39 is a BUSHING,SLEEVE.
What is the NSN for A51B23527-39?
A51B23527-39 is cataloged in the U.S. Government catalog under NSN 3120-01-031-3237. 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.