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Technical Data Sheet
PartsTable / COMPONENT / MILB17931B
MILB17931B ✓ 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 BALL, bore_shape: STRAIGHT, bore_diameter: 0.6691 INCHES MINIMUM AND 0.6693 INCHES MAXIMUM IN, overall_width: 0.6855 INCHES MINIMUM AND 0.6875 INCHES MAXIMUM IN, load_direction: RADIAL, surface_finish: GROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-991-0899, 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
MILB17931B
NSN: 3110-00-991-0899
FSC: 3110
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP E52100 BALL
bore_shapeSTRAIGHT
bore_diameter0.6691 INCHES MINIMUM AND 0.6693 INCHES MAXIMUM IN
overall_width0.6855 INCHES MINIMUM AND 0.6875 INCHES MAXIMUM IN
seal_quantity2
load_directionRADIAL
surface_finishGROUND
shield_quantity1
special_featuresWITHOUT GREASE PLUG
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
bearing_seal_typeLIPS TURNED OUTWARDLY
internal_clearance0.0004 INCHES MINIMUM RADIAL AND 0.0008 INCHES MAXIMUM RADIAL IN
NSN3110-00-991-0899
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MILB17931B · 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
•
SURFACE FINISH: GROUND
•
RETAINER FABRICATION METHOD: PRESSED
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
INTERNAL CLEARANCE: 0.0004 INCHES MINIMUM RADIAL AND 0.0008 INCHES MAXIMUM RADIAL IN
•
LOAD DIRECTION: RADIAL
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-18709 MIL SPEC SINGLE MATERIAL RESPONSE
•
BORE SHAPE: STRAIGHT
•
LUBRICATION MATERIAL: GREASE
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE FINISHGROUND
RETAINER FABRICATION METHODPRESSED
INTERNAL FIT-UP DESIGNATIONSTANDARD
INTERNAL CLEARANCE0.0004 INCHES MINIMUM RADIAL AND 0.0008 INCHES MAXIMUM RADIAL IN
LOAD DIRECTIONRADIAL
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-18709 MIL SPEC SINGLE MATERIAL RESPONSE
BORE SHAPESTRAIGHT
LUBRICATION MATERIALGREASE
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 32
6208-7077V4Interchangeable
interchangeable cross-reference
interchangeable
208TMT58VBInterchangeable
interchangeable cross-reference
interchangeable
6208W1BInterchangeable
interchangeable cross-reference
interchangeable
MM209KCRInterchangeable
interchangeable cross-reference
interchangeable
2650-2275GP2 ITEM 40Interchangeable
interchangeable cross-reference
interchangeable
2650-2775GP5 ITEM 34NTInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILB17931B?
MILB17931B is a BEARING,BALL,ANNULAR.
What parts can replace MILB17931B?
There are 32 known substitutes for MILB17931B: 6208-7077V4, 208TMT58VB, 6208W1B and 29 more. Substitute compatibility should be verified for your specific system.
Is MILB17931B still available?
MILB17931B 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