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Technical Data Sheet
PartsTable / COMPONENT / 667278
667278 ✓ 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

The CUP,TAPERED ROLLER BEARING is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL COMP B1112 OR STEEL COMP 1112 OR STEEL COMP 1212 OVERALL, head_height: 0.250 INCHES NOMINAL IN, thread_length: 0.375 INCHES NOMINAL EXTERNAL IN, overall_length: 0.750 INCHES NOMINAL IN, connection_style: PLAIN, style_designator: PLUG, MACHINE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0601, 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
667278
NSN: 3110-00-100-0601
FSC: 3110
CAGE: 12603 — CLARK EQUIPMENT CO (USA)
SPECIFICATIONS
materialSTEEL COMP B1112 OR STEEL COMP 1112 OR STEEL COMP 1212 OVERALL
head_height0.250 INCHES NOMINAL IN
thread_length0.375 INCHES NOMINAL EXTERNAL IN
overall_length0.750 INCHES NOMINAL IN
connection_stylePLAIN
style_designatorPLUG, MACHINE
thread_directionRIGHT-HAND EXTERNAL
nominal_thread_size0.875 INCHES EXTERNAL IN
thread_pitch_diameters+0.8343 TO 0.8384 INCHES EXTERNAL IN
thread_quantity_per_inch18 EXTERNAL
thread_series_designatorUNS EXTERNAL
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
NSN3110-00-100-0601
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 667278 · 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
•
OUTSIDE DIAMETER: 4.4375 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER4.4375 INCHES NOMINAL IN
OVERALL WIDTH0.8125 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
SPECIAL FEATURESSTEEP ANGLE
MATERIALSTEEL OVERALL
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
30175Interchangeable
interchangeable cross-reference
interchangeable
415256PC2Interchangeable
interchangeable cross-reference
interchangeable
150570HPC175Interchangeable
interchangeable cross-reference
interchangeable
150573PC175Interchangeable
interchangeable cross-reference
interchangeable
150573GPC175Interchangeable
interchangeable cross-reference
interchangeable
CVB41S4302-2PC16Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 667278?
667278 is a CUP,TAPERED ROLLER BEARING.
What parts can replace 667278?
There are 28 known substitutes for 667278: 30175, 415256PC2, 150570HPC175 and 25 more. Substitute compatibility should be verified for your specific system.
Is 667278 still available?
667278 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026