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Technical Data Sheet
PartsTable / COMPONENT / 311S
311S ✓ 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 OVERALL, bore_shape: STRAIGHT, bore_diameter: 2.1652 INCHES MINIMUM AND 2.1654 INCHES MAXIMUM IN, overall_width: 1.1397 INCHES MINIMUM AND 1.1417 INCHES MAXIMUM IN, load_direction: RADIAL, surface_finish: GROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-144-8548, 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
311S
NSN: 3110-00-144-8548
FSC: 3110
CAGE: 63734 — KAITLIN CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
bore_diameter2.1652 INCHES MINIMUM AND 2.1654 INCHES MAXIMUM IN
overall_width1.1397 INCHES MINIMUM AND 1.1417 INCHES MAXIMUM IN
load_directionRADIAL
surface_finishGROUND
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
internal_clearance0.0007 INCHES MINIMUM RADIAL AND 0.0011 INCHES MAXIMUM RADIAL IN
lubrication_materialGREASE
overall_outside_diameter4.7242 INCHES MINIMUM AND 4.7244 INCHES MAXIMUM IN
internal_fit-up_designationTIGHT
nondefinitive_spec/std_data111 TYPE AND 1 CLASS
NSN3110-00-144-8548
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 311S · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
T311Interchangeable
interchangeable cross-reference
interchangeable
T211Interchangeable
interchangeable cross-reference
interchangeable
3311Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-2692Interchangeable
interchangeable cross-reference
interchangeable
6-3-11Interchangeable
interchangeable cross-reference
interchangeable
700721Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 311S?
311S is a BEARING,BALL,ANNULAR.
What parts can replace 311S?
There are 28 known substitutes for 311S: T311, T211, 3311 and 25 more. Substitute compatibility should be verified for your specific system.
Is 311S still available?
311S 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