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Technical Data Sheet
PartsTable / MRO / RB9
RB9 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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,VARIABLE,GLASS DIELECT. Key specifications include shape: CYLINDRICAL, length: 9.000 INCHES IN, end_type: EXTERNAL THREAD FIRST END, material: STEEL COMP E52100 INNER MEMBER, body_style: PISTON, body_length: 0.645 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-287-8602, 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
MRO→ MRO_GENERAL→ RB9
NSN: 3120-00-287-8602
FSC: 3120
CAGE: 77969 — RUBBERCRAFT CORPORATION OF CALIFORNIA, LTD. DBA RUBBERCRAFT CORP (USA)
SPECIFICATIONS
shapeCYLINDRICAL
length9.000 INCHES IN
end_typeEXTERNAL THREAD FIRST END
materialSTEEL COMP E52100 INNER MEMBER
body_stylePISTON
body_length0.645 INCHES NOMINAL IN
bore_diameter0.5620 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
bushing_shapeROUND
bushing_length0.415 INCHES NOMINAL IN
inclosure_typeENCASED
overall_length2.125 INCHES NOMINAL IN
terminal_length2.038 INCHES NOMINAL IN
NSN3120-00-287-8602
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: RB9 · 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
•
LUBRICATION FEATURE: PERFORATION OUTER RACE MEMBER
•
MATERIAL: COPPER ALLOY OUTER RACE MEMBER
•
SURFACE TREATMENT: CHROMIUM INNER MEMBER
•
STYLE DESIGNATOR: WITHOUT INSERT OR LINER
•
OUTER MEMBER OUTSIDE DIAMETER: 1.0932 INCHES MINIMUM AND 1.0937 INCHES MAXIMUM IN
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)
LUBRICATION FEATUREPERFORATION OUTER RACE MEMBER
MATERIALCOPPER ALLOY OUTER RACE MEMBER
SURFACE TREATMENTCHROMIUM INNER MEMBER
LUBRICATION FEATUREGROOVE INTERNAL OUTER MEMBER
STYLE DESIGNATORWITHOUT INSERT OR LINER
LUBRICATION FEATUREGROOVE EXTERNAL OUTER MEMBER
MATERIALSTEEL COMP E52100 INNER MEMBER
OUTER MEMBER OUTSIDE DIAMETER1.0932 INCHES MINIMUM AND 1.0937 INCHES MAXIMUM IN
OUTER MEMBER WIDTH0.4320 INCHES MINIMUM AND 0.4420 INCHES MAXIMUM IN
BORE DIAMETER0.5620 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
RE-52Interchangeable
interchangeable cross-reference
interchangeable
359-SInterchangeable
interchangeable cross-reference
interchangeable
159-150663-01Interchangeable
interchangeable cross-reference
interchangeable
VC1GCInterchangeable
interchangeable cross-reference
interchangeable
RB9Interchangeable
interchangeable cross-reference
interchangeable
HG9MILG3278Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RB9?
RB9 is a CAPACITOR,VARIABLE,GLASS DIELECT. It is classified as a MRO (MRO_GENERAL).
What parts can replace RB9?
There are 6 known substitutes for RB9: RE-52, 359-S, 159-150663-01 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RB9?
RB9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-287-8602. 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