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4M139BC4-29 — BUSHING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

4M139BC4-29: BUSHING,SLEEVE.

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include flange_width: 0.0600 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN, overall_length: 0.3450 INCHES MINIMUM AND 0.3570 INCHES MAXIMUM IN, body_inside_diameter: 0.2435 INCHES MINIMUM AND 0.2450 INCHES MAXIMUM IN, body_outside_diameter: 0.3766 INCHES MINIMUM AND 0.3771 INCHES MAXIMUM IN, flange_outside_diameter: 0.4900 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-129-9150, 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
4M139BC4-29
NSN: 3120-01-129-9150
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 94892 — MASTER MACHINE PRODUCTS CORP (USA)
SPECIFICATIONS
flange_width0.0600 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN
overall_length0.3450 INCHES MINIMUM AND 0.3570 INCHES MAXIMUM IN
body_inside_diameter0.2435 INCHES MINIMUM AND 0.2450 INCHES MAXIMUM IN
body_outside_diameter0.3766 INCHES MINIMUM AND 0.3771 INCHES MAXIMUM IN
flange_outside_diameter0.4900 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
NSN3120-01-129-9150
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 4M139BC4-29 · 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 OUTSIDE DIAMETER: 0.4900 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.3766 INCHES MINIMUM AND 0.3771 INCHES MAXIMUM IN
•
BODY INSIDE DIAMETER: 0.2435 INCHES MINIMUM AND 0.2450 INCHES MAXIMUM IN
•
FLANGE WIDTH: 0.0600 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
FLANGE OUTSIDE DIAMETER0.4900 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.3766 INCHES MINIMUM AND 0.3771 INCHES MAXIMUM IN
OVERALL LENGTH0.3450 INCHES MINIMUM AND 0.3570 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.2435 INCHES MINIMUM AND 0.2450 INCHES MAXIMUM IN
FLANGE WIDTH0.0600 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
10130600Reference document
Same NSN cross-reference
Reference document — Informative reference only
ST4M139BC4-29Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 4M139BC4-29?
4M139BC4-29 is a BUSHING,SLEEVE.
What parts can replace 4M139BC4-29?
There are 2 known substitutes for 4M139BC4-29: 10130600, ST4M139BC4-29. Substitute compatibility should be verified for your specific system.
What is the NSN for 4M139BC4-29?
4M139BC4-29 is cataloged in the U.S. Government catalog under NSN 3120-01-129-9150. 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.