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Technical Data Sheet
PartsTable / COMPONENT / K3977
K3977 ✓ 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 TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, body_width: 1.125 INCHES NOMINAL IN, cone_width: 1.1830 INCHES NOMINAL IN, body_height: 1.125 INCHES NOMINAL IN, body_length: 1.281 INCHES NOMINAL IN, bore_diameter: 2.3622 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-101-0857, 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
K3977
NSN: 3110-00-101-0857
FSC: 3110
CAGE: F0272 — SKF FRANCE (FRA)
SPECIFICATIONS
materialSTEEL OVERALL
body_width1.125 INCHES NOMINAL IN
cone_width1.1830 INCHES NOMINAL IN
body_height1.125 INCHES NOMINAL IN
body_length1.281 INCHES NOMINAL IN
bore_diameter2.3622 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
mounting_methodTHREADED HOLE(S) SINGLE GROUP
frequency_rating400.0 HERTZ NOMINAL SINGLE COMPONENT
style_designatorNORMAL ANGLE
cone_corner_radius0.1406 INCHES NOMINAL IN
nominal_thread_size0.112 INCHES SINGLE GROUP IN
NSN3110-00-101-0857
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: K3977 · 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
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
MATERIAL: STEEL OVERALL
•
CONE CORNER RADIUS: 0.1406 INCHES NOMINAL IN
•
BORE DIAMETER: 2.3622 INCHES NOMINAL IN
•
CONE WIDTH: 1.1830 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE
TECHNICAL CHARACTERISTICS (FLIS)
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
CONE CORNER RADIUS0.1406 INCHES NOMINAL IN
BORE DIAMETER2.3622 INCHES NOMINAL IN
CONE WIDTH1.1830 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
138262Interchangeable
interchangeable cross-reference
interchangeable
AA3521-4-3Interchangeable
interchangeable cross-reference
interchangeable
3850REDInterchangeable
interchangeable cross-reference
interchangeable
9062940Interchangeable
interchangeable cross-reference
interchangeable
A6270Interchangeable
interchangeable cross-reference
interchangeable
C4413Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is K3977?
K3977 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace K3977?
There are 24 known substitutes for K3977: 138262, AA3521-4-3, 3850RED and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for K3977?
K3977 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-101-0857. 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