PartsTable
Technical Data Sheet
MILB17931NT ✓ 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, special_features: TYPE 111 CLASS 8 SIZE 208, bearing_seal_type: CONTACT, lubrication_material: GREASE, departure_from_cited_document: ANNUAL BALL BEARING FOR QUIET OPERATION APPLICATION TO SUBMARINE USAGE, criticality_code_justification: ZZZW. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-891-1546, 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
MILB17931NT
NSN: 3110-00-891-1546
FSC: 3110
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
materialSTEEL OVERALL
seal_quantity2
special_featuresTYPE 111 CLASS 8 SIZE 208
bearing_seal_typeCONTACT
lubrication_materialGREASE
departure_from_cited_documentANNUAL BALL BEARING FOR QUIET OPERATION APPLICATION TO SUBMARINE USAGE
criticality_code_justificationZZZW
lubrication_material_document_and_classificationDOD-G-24508 FED STD SINGLE MATERIAL RESPONSE
reference_number_differentiating_characteristicsQUIET OPERATION TESTED FOR SUBMARINE USAGE
NSN3110-00-891-1546
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MILB17931NT · 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
MATERIAL: STEEL BALL
BORE DIAMETER: 1.3778 INCHES MINIMUM AND 1.3780 INCHES MAXIMUM IN
INTERNAL FIT-UP DESIGNATION: STANDARD
OVERALL OUTSIDE DIAMETER: 3.9368 INCHES MINIMUM AND 3.9370 INCHES MAXIMUM IN
DEPARTURE FROM CITED DOCUMENT: ANNUAL BALL BEARING FOR QUIET OPERATION APPLICATION TO SUBMARINE USAGE
CRITICALITY CODE JUSTIFICATION: ZZZW
STYLE DESIGNATOR: UNIVERSAL GROUND FACES, COUNTERBORED OUTER RING, NON-SEPARABLE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL BALL
MATERIALSTEEL INNER RING
BORE DIAMETER1.3778 INCHES MINIMUM AND 1.3780 INCHES MAXIMUM IN
INTERNAL FIT-UP DESIGNATIONSTANDARD
OVERALL OUTSIDE DIAMETER3.9368 INCHES MINIMUM AND 3.9370 INCHES MAXIMUM IN
DEPARTURE FROM CITED DOCUMENTANNUAL BALL BEARING FOR QUIET OPERATION APPLICATION TO SUBMARINE USAGE
CRITICALITY CODE JUSTIFICATIONZZZW
STYLE DESIGNATORUNIVERSAL GROUND FACES, COUNTERBORED OUTER RING, NON-SEPARABLE
LOAD DIRECTIONANGULAR
NONDEFINITIVE SPEC/STD DATA134 TYPE AND 1 CLASS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
U47D4Interchangeable
interchangeable cross-reference
interchangeable
A346773Interchangeable
interchangeable cross-reference
interchangeable
0155613-00Interchangeable
interchangeable cross-reference
interchangeable
114S2301-917Interchangeable
interchangeable cross-reference
interchangeable
AL63Interchangeable
Same NIIN cross-reference
interchangeable
M17931-A009Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILB17931NT?
MILB17931NT is a BEARING,BALL,ANNULAR.
What parts can replace MILB17931NT?
There are 12 known substitutes for MILB17931NT: U47D4, A346773, 0155613-00 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILB17931NT?
MILB17931NT is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-891-1546. This indicates validated use in U.S. government and defense supply chains.
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