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Technical Data Sheet
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KB4 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The BEARING,PLAIN,ROD END is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_width: 21.500 INCHES NOMINAL IN, inclosure_type: ENCASED, overall_height: 28.000 INCHES NOMINAL IN, overall_length: 27.750 INCHES NOMINAL IN, drive_end_shape: SQUARE SINGLE END EXTERNAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-027-0250, 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
KB4
NSN: 3120-00-027-0250
FSC: 3120
CAGE: 97613 — SARGENT AEROSPACE & DEFENSE, LLC DBA KAHR BEARINGS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width21.500 INCHES NOMINAL IN
inclosure_typeENCASED
overall_height28.000 INCHES NOMINAL IN
overall_length27.750 INCHES NOMINAL IN
drive_end_shapeSQUARE SINGLE END EXTERNAL
special_featuresSTRAIGHT ROUND HANDLE
style_designatorBRACE WITH SINGLE REVOLVING GRIP
basic_shape_styleRECTANGULAR OR SQUARE
surface_treatmentOXIDE OVERALL
drive_surface_size0.500 INCHES NOMINAL SINGLE END IN
installation_designPORTABLE
NSN3120-00-027-0250
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: KB4 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
B107.10Interchangeable
interchangeable cross-reference
interchangeable
B107.10 TY1CL3STAInterchangeable
interchangeable cross-reference
interchangeable
B107.10MInterchangeable
interchangeable cross-reference
interchangeable
KB-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is KB4?
KB4 is a BEARING,PLAIN,ROD END.
What parts can replace KB4?
There are 4 known substitutes for KB4: B107.10, B107.10 TY1CL3STA, B107.10M and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for KB4?
KB4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-027-0250. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026