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Technical Data Sheet
PartsTable / COMPONENT / M173
M173 ✓ 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,PAPER DIELECTRIC. Key specifications include material: COTTON COVERING SINGLE COVERING MATERIAL, bore_shape: STRAIGHT, bore_diameter: 35.00 MILLIMETERS NOMINAL MM, contact_angle: 25.0 DEGREES MAXIMUM, overall_width: 6.086 INCHES NOMINAL IN, alignment_type: SELF-ALIGNING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-4861, 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
M173
NSN: 3110-00-156-4861
FSC: 3110
CAGE: 59690 — KOEHRING CO LORAIN DIV (USA)
SPECIFICATIONS
materialCOTTON COVERING SINGLE COVERING MATERIAL
bore_shapeSTRAIGHT
bore_diameter35.00 MILLIMETERS NOMINAL MM
contact_angle25.0 DEGREES MAXIMUM
overall_width6.086 INCHES NOMINAL IN
alignment_typeSELF-ALIGNING
load_directionANGULAR
overall_height1.560 INCHES NOMINAL IN
overall_length9.187 INCHES NOMINAL IN
surface_finishGROUND
shield_quantity1
style_designatorLOADING GROOVE, NON-SEPARABLE
NSN3110-00-156-4861
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: M173 · 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
•
NONDEFINITIVE SPEC/STD DATA: 00 GRADE AND 145 TYPE
•
CONTACT ANGLE: 25.0 DEGREES MAXIMUM
•
INTERNAL FIT-UP CONTACT ANGULAR DIRECTION: INWARD CONVERGENT
•
SURFACE FINISH: GROUND
•
SHIELD QUANTITY: 1
•
BORE SHAPE: STRAIGHT
•
RETAINER FABRICATION METHOD: PRESSED
•
ALIGNMENT TYPE: SELF-ALIGNING
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)
NONDEFINITIVE SPEC/STD DATA00 GRADE AND 145 TYPE
CONTACT ANGLE25.0 DEGREES MAXIMUM
INTERNAL FIT-UP CONTACT ANGULAR DIRECTIONINWARD CONVERGENT
SURFACE FINISHGROUND
SHIELD QUANTITY1
BORE SHAPESTRAIGHT
RETAINER FABRICATION METHODPRESSED
ALIGNMENT TYPESELF-ALIGNING
LOAD DIRECTIONANGULAR
STANDARD TOLERANCE DESIGNATIONABEC NO.1
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
10059Interchangeable
interchangeable cross-reference
interchangeable
321939-1Interchangeable
interchangeable cross-reference
interchangeable
321939-1-40Interchangeable
interchangeable cross-reference
interchangeable
9A72487-72200Interchangeable
interchangeable cross-reference
interchangeable
72200-72487Interchangeable
interchangeable cross-reference
interchangeable
F695Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M173?
M173 is a CAPACITOR,FIXED,PAPER DIELECTRIC.
What parts can replace M173?
There are 25 known substitutes for M173: 10059, 321939-1, 321939-1-40 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M173?
M173 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-4861. 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