PartsTable
Technical Data Sheet
Download PDF

B8399 — PLATE,RETAINING,BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

B8399: PLATE,RETAINING,BEARING.

The PLATE,RETAINING,BEARING is a the manufacturer industrial component. Key specifications include outside_diameter: 3.969 INCHES NOMINAL IN, style_designator: ROUND, aperture_diameter: 1.880 INCHES NOMINAL IN, mounting_hole_type: ROUND, UNTHREADED, mounting_hole_diameter: 0.281 INCHES NOMINAL IN, mounting_bolt_circle_diameter: 3.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-421-4613, 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
B8399
NSN: 3110-00-421-4613
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 01014 — AVTRON AEROSPACE INC (USA)
SPECIFICATIONS
outside_diameter3.969 INCHES NOMINAL IN
style_designatorROUND
aperture_diameter1.880 INCHES NOMINAL IN
mounting_hole_typeROUND, UNTHREADED
mounting_hole_diameter0.281 INCHES NOMINAL IN
bolt_circle_hole_quantity8
mounting_bolt_circle_diameter3.500 INCHES NOMINAL IN
mounting_hole_arrangement_styleSINGLE BOLT HOLE CIRCLE
NSN3110-00-421-4613
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: B8399 · 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
•
BOLT CIRCLE HOLE QUANTITY: 8
•
MOUNTING HOLE TYPE: ROUND, UNTHREADED
•
MOUNTING HOLE ARRANGEMENT STYLE: SINGLE BOLT HOLE CIRCLE
•
STYLE DESIGNATOR: ROUND
•
MOUNTING HOLE DIAMETER: 0.281 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 3.969 INCHES NOMINAL IN
•
APERTURE DIAMETER: 1.880 INCHES NOMINAL IN
•
MOUNTING BOLT CIRCLE DIAMETER: 3.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
BOLT CIRCLE HOLE QUANTITY8
MOUNTING HOLE TYPEROUND, UNTHREADED
MOUNTING HOLE ARRANGEMENT STYLESINGLE BOLT HOLE CIRCLE
STYLE DESIGNATORROUND
MOUNTING HOLE DIAMETER0.281 INCHES NOMINAL IN
OUTSIDE DIAMETER3.969 INCHES NOMINAL IN
APERTURE DIAMETER1.880 INCHES NOMINAL IN
MOUNTING BOLT CIRCLE DIAMETER3.500 INCHES NOMINAL IN
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy B8399?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is B8399?
B8399 is a PLATE,RETAINING,BEARING.
What is the NSN for B8399?
B8399 is cataloged in the U.S. Government catalog under NSN 3110-00-421-4613. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — B8399

✓ PartsTable — the parts reference. Every fact cited to its source.
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.