PartsTable
Technical Data Sheet
PartsTable / MRO / 12904-1
12904-1 ✓ 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

The CAPACITOR,FIXED,ELECTROLYTIC is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include material: PLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER) OVERALL, anode_type: SOLID, body_style: W/O MTG FACILITIES, AXIAL TERMINALS, body_length: 0.655 INCHES MINIMUM AND 0.717 INCHES MAXIMUM IN, corner_shape: SQUARE ALL CORNERS, body_diameter: 0.274 INCHES MINIMUM AND 0.305 INCHES MAXIMUM 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 3120-01-162-4931, 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→ 12904-1
NSN: 3120-01-162-4931
FSC: 3120
CAGE: 74063 — TE CONNECTIVITY CORPORATION (USA)
SPECIFICATIONS
materialPLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER) OVERALL
anode_typeSOLID
body_styleW/O MTG FACILITIES, AXIAL TERMINALS
body_length0.655 INCHES MINIMUM AND 0.717 INCHES MAXIMUM IN
corner_shapeSQUARE ALL CORNERS
body_diameter0.274 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN
hole_diameter0.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
terminal_length1.250 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
outside_diameter3.270 INCHES NOMINAL IN
special_featuresOFF-CENTERED APERTURE 1.245 INCHES O.D. LABELED FOR SHUT AND OPEN POSITION AND ONE OBLONG HOLE WITH THE CENTER ON THE CENTER LINE OF THE GASKET IN
style_designatorCIRCULAR
features_providedHERMETICALLY SEALED CASE
NSN3120-01-162-4931
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 12904-1 · 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 INSIDE DIAMETER: 0.3750 INCHES NOMINAL IN
•
FUNCTIONAL DESCRIPTION: USED ON GUIDE,PUSH ROD
•
REFERENCE DATA AND LITERATURE: NAVWEPS03-5AJ-29/T.O.8R3-44-4 FIGURE 3 INDEX 23
•
TYPE/MODEL DESIGNATION: B-123B/J/GL
•
CORNER SHAPE: SQUARE ALL CORNERS
•
STYLE DESIGNATOR: SOLID, EXTERNAL FLANGE ONE END
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)
BODY INSIDE DIAMETER0.3750 INCHES NOMINAL IN
END ITEM IDENTIFICATION5945-00-858-4485 POWER CONTACTOR AND 5945-00-675-7413 CONTACTOR
FUNCTIONAL DESCRIPTIONUSED ON GUIDE,PUSH ROD
REFERENCE DATA AND LITERATURENAVWEPS03-5AJ-29/T.O.8R3-44-4 FIGURE 3 INDEX 23
TYPE/MODEL DESIGNATIONB-123B/J/GL
CORNER SHAPESQUARE ALL CORNERS
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
MIL-PRF-39003/1Interchangeable
interchangeable cross-reference
interchangeable
123300-566Interchangeable
interchangeable cross-reference
interchangeable
M39003/01-2513Interchangeable
interchangeable cross-reference
interchangeable
22105 ITEM 12 PN A-630-12904-1Interchangeable
interchangeable cross-reference
interchangeable
12904Interchangeable
interchangeable cross-reference
interchangeable
A-630-12904-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12904-1?
12904-1 is a CAPACITOR,FIXED,ELECTROLYTIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace 12904-1?
There are 7 known substitutes for 12904-1: MIL-PRF-39003/1, 123300-566, M39003/01-2513 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12904-1?
12904-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-162-4931. 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