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M17931-A017 — BEARING,BALL,ANNULAR

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

M17931-A017: BEARING,BALL,ANNULAR.

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 1.9683 INCHES MINIMUM AND 1.9685 INCHES MAXIMUM IN, overall_width: 2.1160 INCHES MINIMUM AND 2.1260 INCHES MAXIMUM IN, load_direction: ANGULAR, surface_finish: GROUND, style_designator: UNIVERSAL GROUND FACES, COUNTERBORED OUTER RING, NON-SEPARABLE. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-992-1012, 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
M17931-A017
NSN: 3110-00-992-1012
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 3NPS1 — RBC AIRCRAFT PRODUCTS, INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter1.9683 INCHES MINIMUM AND 1.9685 INCHES MAXIMUM IN
overall_width2.1160 INCHES MINIMUM AND 2.1260 INCHES MAXIMUM IN
load_directionANGULAR
surface_finishGROUND
style_designatorUNIVERSAL GROUND FACES, COUNTERBORED OUTER RING, NON-SEPARABLE
overall_outside_diameter4.3305 INCHES MINIMUM AND 4.3307 INCHES MAXIMUM IN
internal_fit-up_designationTIGHT
nondefinitive_spec/std_data134 TYPE AND 2 CLASS
retainer_fabrication_methodPRESSED
departure_from_cited_documentANNUAL BALL BEARING FOR QUIET OPERATION APPLICATION TO SUBMARINE USAGE
criticality_code_justificationZZZW
NSN3110-00-992-1012
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: M17931-A017 · 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
•
RETAINER FABRICATION METHOD: PRESSED
•
INTERNAL FIT-UP DESIGNATION: TIGHT
•
SURFACE FINISH: GROUND
•
CRITICALITY CODE JUSTIFICATION: ZZZW
•
STYLE DESIGNATOR: UNIVERSAL GROUND FACES, COUNTERBORED OUTER RING, NON-SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 4.3305 INCHES MINIMUM AND 4.3307 INCHES MAXIMUM IN
•
DEPARTURE FROM CITED DOCUMENT: ANNUAL BALL BEARING FOR QUIET OPERATION APPLICATION TO SUBMARINE USAGE
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODPRESSED
INTERNAL FIT-UP DESIGNATIONTIGHT
SURFACE FINISHGROUND
CRITICALITY CODE JUSTIFICATIONZZZW
STYLE DESIGNATORUNIVERSAL GROUND FACES, COUNTERBORED OUTER RING, NON-SEPARABLE
OVERALL WIDTH2.1160 INCHES MINIMUM AND 2.1260 INCHES MAXIMUM IN
OVERALL OUTSIDE DIAMETER4.3305 INCHES MINIMUM AND 4.3307 INCHES MAXIMUM IN
DEPARTURE FROM CITED DOCUMENTANNUAL BALL BEARING FOR QUIET OPERATION APPLICATION TO SUBMARINE USAGE
NONDEFINITIVE SPEC/STD DATA134 TYPE AND 2 CLASS
LOAD DIRECTIONANGULAR
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES 6
S7BT2L4B-22-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
30310DTL7077Reference document
Same NSN cross-reference
Reference document — Secondary reference
999999K179Reference document
Same NSN cross-reference
Reference document — Secondary reference
MILB17931NTReference document
Same NSN cross-reference
Reference document — Secondary reference
MILB17931Reference document
Same NSN cross-reference
Reference document — Identification reference
7310DSXX00X015B13DG655BReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedDemilitarization required — mutilation + specific procedure
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FREQUENTLY ASKED QUESTIONS
What is M17931-A017?
M17931-A017 is a BEARING,BALL,ANNULAR.
What parts can replace M17931-A017?
There are 6 known substitutes for M17931-A017: S7BT2L4B-22-1, 30310DTL7077, 999999K179 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M17931-A017?
M17931-A017 is cataloged in the U.S. Government catalog under NSN 3110-00-992-1012. This indicates validated use in U.S. government and defense supply chains.
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U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.