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MILB17931 — BEARING,BALL,ANNULAR

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

MILB17931: BEARING,BALL,ANNULAR.

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include bore_shape: STRAIGHT, bore_diameter: 2.9526 INCHES MINIMUM AND 2.9528 INCHES MAXIMUM IN, overall_width: 0.9843 INCHES MAXIMUM IN, load_direction: RADIAL, internal_clearance: 0.0008 INCHES MINIMUM RADIAL AND 0.0012 INCHES MAXIMUM RADIAL IN, lubrication_material: GREASE. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-129-6525, 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
MILB17931
NSN: 3110-00-129-6525
NIINs: 001296525, 001981632, 005165490, 007297252, 008911546, 009637269, 009769738, 009769743, 009838281, 009838284, 009873700, 009873712, 009873715, 009873716, 009873717, 009873718, 009873719, 009873720, 009873721, 009873722, 009873723, 009873724, 009873725, 009873726, 009873727, 009873728, 009873730, 009873731, 009873732, 009873733, 009873734, 009873735, 009873736, 009873737, 009873739, 009873741, 009873742, 009873743, 009873744, 009873745, 009910896, 009910897, 009910901, 009910902, 009910903, 009910904, 009910906, 009910907, 009910908, 009910909, 009910910, 009910911, 009910914, 009910916, 009910918, 009910919, 009910921, 009910928, 009910938, 009910939, 009910942, 009910943, 009910944, 009910945, 009910946, 009910947, 009910948, 009910949, 009910950, 009910956, 009910959, 009910960, 009910961, 009910964, 009910966, 009921005, 009921008, 009921009, 009921010, 009921011, 009921012, 009921013, 009921015, 009921016, 009921017, 009921018, 009921019, 010548438, 010578983, 010604875, 010670623, 013718796, 013866189, 013868558, 014912888, 015741702
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
bore_shapeSTRAIGHT
bore_diameter2.9526 INCHES MINIMUM AND 2.9528 INCHES MAXIMUM IN
overall_width0.9843 INCHES MAXIMUM IN
load_directionRADIAL
internal_clearance0.0008 INCHES MINIMUM RADIAL AND 0.0012 INCHES MAXIMUM RADIAL IN
lubrication_materialGREASE
end_item_identificationPUMP CTFGL,280GPM,PSI 3335RPM RPM
overall_outside_diameter5.1179 INCHES MINIMUM AND 5.1181 INCHES MAXIMUM IN
lubrication_material_document_and_classificationMIL-G-18709 MIL SPEC SINGLE MATERIAL RESPONSE
NSN3110-00-129-6525
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MILB17931 · 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
•
LUBRICATION MATERIAL: GREASE
•
INTERNAL CLEARANCE: 0.0007 INCHES MINIMUM RADIAL AND 0.0011 INCHES MAXIMUM RADIAL IN
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
SURFACE FINISH: GROUND
•
SHIELD QUANTITY: 2
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 4.7242 INCHES MINIMUM AND 4.7244 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
LUBRICATION MATERIALGREASE
INTERNAL CLEARANCE0.0007 INCHES MINIMUM RADIAL AND 0.0011 INCHES MAXIMUM RADIAL IN
INTERNAL FIT-UP DESIGNATIONSTANDARD
SURFACE FINISHGROUND
SHIELD QUANTITY2
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
OVERALL WIDTH1.1416 INCHES MINIMUM AND 1.1417 INCHES MAXIMUM IN
OVERALL OUTSIDE DIAMETER4.7242 INCHES MINIMUM AND 4.7244 INCHES MAXIMUM IN
BORE SHAPESTRAIGHT
NONDEFINITIVE SPEC/STD DATA111 TYPE
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 5
385P525G01Reference document
Same NSN cross-reference
Reference document — Secondary reference
S385P525G01Reference document
Same NSN cross-reference
Reference document — Secondary reference
311SZZNT3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
77311-4ES100Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
77611S7077V4Reference 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 MILB17931?
MILB17931 is a BEARING,BALL,ANNULAR.
What parts can replace MILB17931?
There are 5 known substitutes for MILB17931: 385P525G01, S385P525G01, 311SZZNT3 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILB17931?
MILB17931 is cataloged in the U.S. Government catalog under NSN 3110-00-129-6525. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
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.