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Technical Data Sheet
PartsTable / COMPONENT / 3-40512-1
3-40512-1 ✓ 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,MICA DIELECTRIC. Key specifications include material: COPPER ALLOY 955 OVERALL, corner_shape: SQUARE OUTSIDE RIGHT CORNER, flange_width: 0.0590 INCHES MINIMUM AND 0.0600 INCHES MAXIMUM IN, overall_length: 0.7500 INCHES NOMINAL IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, surface_treatment: CADMIUM RIGHT END SURFACE OF BODY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-827-5560, 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
3-40512-1
NSN: 3120-00-827-5560
FSC: 3120
CAGE: 0JRC1 — NORTHROP GRUMMAN TECHNICAL SERVICES, INC. DBA DEFENSE SYSTEMS SECTOR (USA)
SPECIFICATIONS
materialCOPPER ALLOY 955 OVERALL
corner_shapeSQUARE OUTSIDE RIGHT CORNER
flange_width0.0590 INCHES MINIMUM AND 0.0600 INCHES MAXIMUM IN
overall_length0.7500 INCHES NOMINAL IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
surface_treatmentCADMIUM RIGHT END SURFACE OF BODY
body_inside_diameter0.3730 INCHES MINIMUM AND 0.3740 INCHES MAXIMUM IN
body_outside_diameter0.5009 INCHES MINIMUM AND 0.5015 INCHES MAXIMUM IN
flange_outside_diameter0.7400 INCHES MINIMUM AND 0.7600 INCHES MAXIMUM IN
material_document_and_classificationQQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN3120-00-827-5560
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 3-40512-1 · 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
•
CORNER SHAPE: SQUARE LEFT FLANGE BODY CORNER
•
SURFACE TREATMENT: CADMIUM INSIDE DIAMETER SURFACE OF BODY
•
MATERIAL: COPPER ALLOY 955 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE 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)
CORNER SHAPESQUARE LEFT FLANGE BODY CORNER
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPESQUARE INSIDE RIGHT CORNER
SURFACE TREATMENTCADMIUM INSIDE DIAMETER SURFACE OF BODY
MATERIALCOPPER ALLOY 955 OVERALL
SURFACE TREATMENTCADMIUM OUTSIDE DIAMETER SURFACE OF BODY
CORNER SHAPESQUARE INSIDE LEFT CORNER
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTCADMIUM RIGHT END SURFACE OF LEFT FLANGE
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
107112Interchangeable
interchangeable cross-reference
interchangeable
301974Interchangeable
interchangeable cross-reference
interchangeable
FHN55WInterchangeable
interchangeable cross-reference
interchangeable
M16Interchangeable
interchangeable cross-reference
interchangeable
B16.22Interchangeable
interchangeable cross-reference
interchangeable
001235-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3-40512-1?
3-40512-1 is a CAPACITOR,FIXED,MICA DIELECTRIC.
What parts can replace 3-40512-1?
There are 7 known substitutes for 3-40512-1: 107112, 301974, FHN55W and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3-40512-1?
3-40512-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-827-5560. 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