PartsTable
Technical Data Sheet
66990 ✓ 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 BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL COMP E52100 OVERALL, bore_shape: STRAIGHT, bore_diameter: 20.00 MILLIMETERS NOMINAL MM, overall_width: 12.00 MILLIMETERS NOMINAL MM, load_direction: RADIAL, surface_finish: GROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-133-6595, 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
66990
NSN: 3110-00-133-6595
FSC: 3110
CAGE: 59211 — PARKER-HANNIFIN CORPORATION DBA SERVICE AND SUPPORT OPERATION DIV SERVICES AND SUPPORT OPERATIONS (USA)
SPECIFICATIONS
materialSTEEL COMP E52100 OVERALL
bore_shapeSTRAIGHT
bore_diameter20.00 MILLIMETERS NOMINAL MM
overall_width12.00 MILLIMETERS NOMINAL MM
load_directionRADIAL
surface_finishGROUND
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
overall_outside_diameter42.00 MILLIMETERS NOMINAL MM
internal_fit-up_designationSTANDARD
standard_tolerance_designationABEC NO.1
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN3110-00-133-6595
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 66990 · 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
BORE DIAMETER: 20.00 MILLIMETERS NOMINAL MM
BORE SHAPE: STRAIGHT
MATERIAL: STEEL COMP E52100 OVERALL
STANDARD TOLERANCE DESIGNATION: ABEC NO.1
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
SURFACE FINISH: GROUND
INTERNAL FIT-UP DESIGNATION: STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER20.00 MILLIMETERS NOMINAL MM
BORE SHAPESTRAIGHT
MATERIALSTEEL COMP E52100 OVERALL
STANDARD TOLERANCE DESIGNATIONABEC NO.1
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
SURFACE FINISHGROUND
INTERNAL FIT-UP DESIGNATIONSTANDARD
LOAD DIRECTIONRADIAL
OVERALL OUTSIDE DIAMETER42.00 MILLIMETERS NOMINAL MM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
3L04X1XInterchangeable
interchangeable cross-reference
interchangeable
3L04X1Interchangeable
interchangeable cross-reference
interchangeable
6104Interchangeable
interchangeable cross-reference
interchangeable
A-004Interchangeable
interchangeable cross-reference
interchangeable
SK56Y21-92-1 SIZE A-004Interchangeable
interchangeable cross-reference
interchangeable
922924Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 66990?
66990 is a BEARING,BALL,ANNULAR.
What parts can replace 66990?
There are 9 known substitutes for 66990: 3L04X1X, 3L04X1, 6104 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 66990?
66990 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-133-6595. This indicates validated use in U.S. government and defense supply chains.
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