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427449 — HOUSING,BEARING UNIT

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

427449: HOUSING,BEARING UNIT.

The HOUSING,BEARING UNIT is a the manufacturer industrial component. Key specifications include bore_diameter: 4.7480 INCHES MINIMUM AND 4.7490 INCHES MAXIMUM IN, housing_length: 2.9370 INCHES NOMINAL IN, flange_thickness: 0.5000 INCHES NOMINAL IN, special_features: CAST IRON 3838-T-20 78500, bolt_circle_diameter: 6.2500 INCHES NOMINAL IN, mounting_hole_diameter: 0.5312 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3130-00-040-1432, 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
427449
NSN: 3130-00-040-1432
FSC: 3130 — Bearings, Mounted
CAGE: 65282 — WHITE MOTOR CORP (USA)
SPECIFICATIONS
bore_diameter4.7480 INCHES MINIMUM AND 4.7490 INCHES MAXIMUM IN
housing_length2.9370 INCHES NOMINAL IN
flange_thickness0.5000 INCHES NOMINAL IN
special_featuresCAST IRON 3838-T-20 78500
bolt_circle_diameter6.2500 INCHES NOMINAL IN
mounting_hole_diameter0.5312 INCHES NOMINAL IN
NSN3130-00-040-1432
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 427449 · 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 THICKNESS: 0.5000 INCHES NOMINAL IN
•
MOUNTING HOLE DIAMETER: 0.5312 INCHES NOMINAL IN
•
BOLT CIRCLE DIAMETER: 6.2500 INCHES NOMINAL IN
•
BORE DIAMETER: 4.7480 INCHES MINIMUM AND 4.7490 INCHES MAXIMUM IN
•
HOUSING LENGTH: 2.9370 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE THICKNESS0.5000 INCHES NOMINAL IN
MOUNTING HOLE DIAMETER0.5312 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER6.2500 INCHES NOMINAL IN
SPECIAL FEATURESCAST IRON 3838-T-20 78500
BORE DIAMETER4.7480 INCHES MINIMUM AND 4.7490 INCHES MAXIMUM IN
HOUSING LENGTH2.9370 INCHES NOMINAL IN
OTHER ITEMS IN FSC 3130 — Bearings, Mounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3130-00-001-5118 3130-00-001-5137 3130-00-001-6585 3130-00-003-0422 3130-00-003-0455 3130-00-003-0794 3130-00-003-2802 3130-00-003-9535
SUBSTITUTES & CROSS-REFERENCES 2
BB15141Reference document
Same NSN cross-reference
Reference document — Secondary reference
A3838G85Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 427449?
427449 is a HOUSING,BEARING UNIT.
What parts can replace 427449?
There are 2 known substitutes for 427449: BB15141, A3838G85. Substitute compatibility should be verified for your specific system.
What is the NSN for 427449?
427449 is cataloged in the U.S. Government catalog under NSN 3130-00-040-1432. 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.