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4B21B6-113 — BUSHING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

4B21B6-113: BUSHING,SLEEVE.

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 642 OVERALL, overall_length: 1.4017 INCHES MINIMUM AND 1.4062 INCHES MAXIMUM IN, body_inside_diameter: 0.3745 INCHES MINIMUM AND 0.3755 INCHES MAXIMUM IN, body_outside_diameter: 0.4980 INCHES MINIMUM AND 0.4985 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-288-2145, 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
4B21B6-113
NSN: 3120-01-288-2145
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 43999 — THE BOEING COMPANY DIV LEGACY AM&M (USA)
SPECIFICATIONS
materialCOPPER ALLOY 642 OVERALL
overall_length1.4017 INCHES MINIMUM AND 1.4062 INCHES MAXIMUM IN
body_inside_diameter0.3745 INCHES MINIMUM AND 0.3755 INCHES MAXIMUM IN
body_outside_diameter0.4980 INCHES MINIMUM AND 0.4985 INCHES MAXIMUM IN
NSN3120-01-288-2145
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 4B21B6-113 · 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
•
BODY OUTSIDE DIAMETER: 0.4980 INCHES MINIMUM AND 0.4985 INCHES MAXIMUM IN
•
BODY INSIDE DIAMETER: 0.3745 INCHES MINIMUM AND 0.3755 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY 642 OVERALL
TECHNICAL CHARACTERISTICS
BODY OUTSIDE DIAMETER0.4980 INCHES MINIMUM AND 0.4985 INCHES MAXIMUM IN
OVERALL LENGTH1.4017 INCHES MINIMUM AND 1.4062 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.3745 INCHES MINIMUM AND 0.3755 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY 642 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

No substitute or cross-reference records for this part.

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 4B21B6-113?
4B21B6-113 is a BUSHING,SLEEVE.
What is the NSN for 4B21B6-113?
4B21B6-113 is cataloged in the U.S. Government catalog under NSN 3120-01-288-2145. 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.