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Technical Data Sheet
PartsTable / COMPONENT / 4-X-81
4-X-81 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

SPINDLE,WHEEL,DRIVING-NONDRIVING. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-698-4040, 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
4-X-81
NSN: 3120-00-698-4040
FSC: 3120
CAGE: 70876 — BATH IRON WORKS CORPORATION (USA)
SPECIFICATIONS
Part Number4-X-81
NSN3120-00-698-4040
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 4-X-81 · 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
•
CORNER SHAPE: SQUARE OUTSIDE RIGHT CORNER
•
ANTIROTATION/LUBRICATION TYPE AND QUANTITY: 3 HOLE
•
BODY OUTSIDE DIAMETER: 0.9070 INCHES MINIMUM AND 0.9080 INCHES MAXIMUM IN
•
LUBRICANT ACCOMMODATION STYLE: GROOVED CLOSED BOTH ENDS AND GROOVED CIRCULAR
TECHNICAL CHARACTERISTICS (FLIS)
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
ANTIROTATION/LUBRICATION TYPE AND QUANTITY3 HOLE
OVERALL LENGTH0.9350 INCHES MINIMUM AND 0.9370 INCHES MAXIMUM IN
CORNER SHAPECHAMFERED INSIDE LEFT CORNER
BODY OUTSIDE DIAMETER0.9070 INCHES MINIMUM AND 0.9080 INCHES MAXIMUM IN
CORNER SHAPECHAMFERED INSIDE RIGHT CORNER
LUBRICANT ACCOMMODATION STYLEGROOVED CLOSED BOTH ENDS AND GROOVED CIRCULAR
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
SURFACE GROOVE LOCATION AND QUANTITY1 EXTERNAL AND 2 INTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
0698-7493Interchangeable
interchangeable cross-reference
interchangeable
169-38279-01Interchangeable
interchangeable cross-reference
interchangeable
416340-531Interchangeable
interchangeable cross-reference
interchangeable
4-X-81Interchangeable
interchangeable cross-reference
interchangeable
4-1205Interchangeable
interchangeable cross-reference
interchangeable
MSC80616Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4-X-81?
4-X-81 is a SPINDLE,WHEEL,DRIVING-NONDRIVING.
What parts can replace 4-X-81?
There are 12 known substitutes for 4-X-81: 0698-7493, 169-38279-01, 416340-531 and 9 more. Substitute compatibility should be verified for your specific system.
Is 4-X-81 still available?
4-X-81 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026