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Technical Data Sheet
PartsTable / COMPONENT / 53A68A81
53A68A81 ✓ 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

CAPACITOR,FIXED,PLASTIC DIELECTR. Key specifications include material: COPPER ALLOY OVERALL, corner_shape: ROUND LEFT FLANGE BODY CORNER, flange_width: 0.0630 INCHES NOMINAL IN, overall_length: 0.3750 INCHES NOMINAL IN, surface_finish: 100.0 MICROINCHES OVERALL, style_designator: SOLID, EXTERNAL FLANGE ONE END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-071-8758, 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
53A68A81
NSN: 3120-00-071-8758
FSC: 3120
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
corner_shapeROUND LEFT FLANGE BODY CORNER
flange_width0.0630 INCHES NOMINAL IN
overall_length0.3750 INCHES NOMINAL IN
surface_finish100.0 MICROINCHES OVERALL
style_designatorSOLID, EXTERNAL FLANGE ONE END
body_inside_diameter0.3760 INCHES MINIMUM AND 0.3780 INCHES MAXIMUM IN
body_outside_diameter0.4690 INCHES NOMINAL IN
flange_outside_diameter0.7500 INCHES NOMINAL IN
NSN3120-00-071-8758
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 53A68A81 · 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 WIDTH: 0.0630 INCHES NOMINAL IN
•
FLANGE OUTSIDE DIAMETER: 0.7500 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 0.4690 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 0.3760 INCHES MINIMUM AND 0.3780 INCHES MAXIMUM IN
•
CORNER SHAPE: ROUND LEFT FLANGE BODY CORNER
•
MATERIAL: COPPER ALLOY OVERALL
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE WIDTH0.0630 INCHES NOMINAL IN
OVERALL LENGTH0.3750 INCHES NOMINAL IN
FLANGE OUTSIDE DIAMETER0.7500 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.4690 INCHES NOMINAL IN
BODY INSIDE DIAMETER0.3760 INCHES MINIMUM AND 0.3780 INCHES MAXIMUM IN
CORNER SHAPEROUND LEFT FLANGE BODY CORNER
MATERIALCOPPER ALLOY OVERALL
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
XH5531Interchangeable
interchangeable cross-reference
interchangeable
16169Interchangeable
interchangeable cross-reference
interchangeable
12364Interchangeable
interchangeable cross-reference
interchangeable
AE22C104MTInterchangeable
interchangeable cross-reference
interchangeable
6515NCM105469Interchangeable
interchangeable cross-reference
interchangeable
02.212.058Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 53A68A81?
53A68A81 is a CAPACITOR,FIXED,PLASTIC DIELECTR.
What parts can replace 53A68A81?
There are 6 known substitutes for 53A68A81: XH5531, 16169, 12364 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 53A68A81?
53A68A81 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-071-8758. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026