PartsTable
Technical Data Sheet
PartsTable / COMPONENT / W1 3-8
W1 3-8 ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

CAPACITOR,FIXED,CERAMIC DIELECTR. Key specifications include material: STEEL COMP E51100 OR STEEL COMP E52100 OVERALL, alignment_type: RIGID, overall_height: 0.7187 INCHES NOMINAL IN, surface_finish: GROUND, special_features: DIRECT READING POCKET DOSIMETER; LOW LEAKAGE MEASURES BACKGROUND; HIGHLY RESISTANT TO SHOCK AND VIBRATION, style_designator: GROOVED RACE SURFACE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-1725, 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
W1 3-8
NSN: 3110-00-156-1725
FSC: 3110
CAGE: 43991 — FAG BEARINGS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP E51100 OR STEEL COMP E52100 OVERALL
alignment_typeRIGID
overall_height0.7187 INCHES NOMINAL IN
surface_finishGROUND
special_featuresDIRECT READING POCKET DOSIMETER; LOW LEAKAGE MEASURES BACKGROUND; HIGHLY RESISTANT TO SHOCK AND VIBRATION
style_designatorGROOVED RACE SURFACE
bore_smallest_diameter1.3750 INCHES NOMINAL IN
overall_outside_diameter2.2187 INCHES NOMINAL IN
standard_tolerance_designationAFBMA STD TOLERANCE FOR THRUST BEARINGS
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
general_characteristics_item_descriptionITEM IS 6.600 INS NOM LG; 1.300 INS NOM W
part_name_assigned_by_controlling_agencyDETECTOR RADIAC DIRECT READING DOSIMETER LOW LEAK MEASURES BACKG
NSN3110-00-156-1725
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: W1 3-8 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OVERALL OUTSIDE DIAMETER: 2.2187 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR THRUST BEARINGS
•
THRUST DIRECTIONAL CAPABILITY DESIGNATION: SINGLE
•
STYLE DESIGNATOR: GROOVED RACE SURFACE
•
MATERIAL: STEEL COMP E51100 OR STEEL COMP E52100 OVERALL
•
ALIGNMENT TYPE: RIGID
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)
OVERALL OUTSIDE DIAMETER2.2187 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR THRUST BEARINGS
OVERALL HEIGHT0.7187 INCHES NOMINAL IN
THRUST DIRECTIONAL CAPABILITY DESIGNATIONSINGLE
STYLE DESIGNATORGROOVED RACE SURFACE
MATERIALSTEEL COMP E51100 OR STEEL COMP E52100 OVERALL
ALIGNMENT TYPERIGID
SPECIAL FEATURES1.4063 LARGE BORE
SURFACE FINISHGROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
8BInterchangeable
interchangeable cross-reference
interchangeable
011Interchangeable
interchangeable cross-reference
interchangeable
G-375-B-011SUAInterchangeable
interchangeable cross-reference
interchangeable
1227TInterchangeable
interchangeable cross-reference
interchangeable
1227T4311Interchangeable
interchangeable cross-reference
interchangeable
M0DEL1227T0-50UADCInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is W1 3-8?
W1 3-8 is a CAPACITOR,FIXED,CERAMIC DIELECTR.
What parts can replace W1 3-8?
There are 28 known substitutes for W1 3-8: 8B, 011, G-375-B-011SUA and 25 more. Substitute compatibility should be verified for your specific system.
What is the NSN for W1 3-8?
W1 3-8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-1725. 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