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KJB447999B-1 — BEARING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

KJB447999B-1: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OUTER LAYER, corner_shape: SQUARE ALL CORNERS, overall_length: 2.8650 INCHES MINIMUM AND 2.8750 INCHES MAXIMUM IN, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, surface_treatment: PASSIVATE OUTER LAYER, body_inside_diameter: 8.7297 INCHES MINIMUM AND 8.7325 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-931-3689, 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
KJB447999B-1
NSN: 3120-00-931-3689
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 50632 — KAMATICS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 630 OUTER LAYER
corner_shapeSQUARE ALL CORNERS
overall_length2.8650 INCHES MINIMUM AND 2.8750 INCHES MAXIMUM IN
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
surface_treatmentPASSIVATE OUTER LAYER
body_inside_diameter8.7297 INCHES MINIMUM AND 8.7325 INCHES MAXIMUM IN
body_outside_diameter8.8011 INCHES MINIMUM AND 8.8111 INCHES MAXIMUM IN
end_item_identificationC-141 ACFT
material_document_and_classificationAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OUTER LAYER
NSN3120-00-931-3689
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: KJB447999B-1 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY OUTSIDE DIAMETER: 8.8011 INCHES MINIMUM AND 8.8111 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OUTER LAYER
•
BODY INSIDE DIAMETER: 8.7297 INCHES MINIMUM AND 8.7325 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OUTER LAYER
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER8.8011 INCHES MINIMUM AND 8.8111 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OUTER LAYER
OVERALL LENGTH2.8650 INCHES MINIMUM AND 2.8750 INCHES MAXIMUM IN
BODY INSIDE DIAMETER8.7297 INCHES MINIMUM AND 8.7325 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OUTER LAYER
END ITEM IDENTIFICATIONC-141 ACFT
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE INNER LAYER
MATERIALSTEEL COMP 630 OUTER LAYER
SUBSTITUTES & CROSS-REFERENCES 1
7938284-1Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is KJB447999B-1?
KJB447999B-1 is a BEARING,SLEEVE.
What parts can replace KJB447999B-1?
There is 1 known substitute for KJB447999B-1: 7938284-1. Substitute compatibility should be verified for your specific system.
What is the NSN for KJB447999B-1?
KJB447999B-1 is cataloged in the U.S. Government catalog under NSN 3120-00-931-3689. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.