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Technical Data Sheet
PartsTable / COMPONENT / B28L
B28L ✓ 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,SELF-ALIGNING is a the manufacturer industrial component. Key specifications include end_item_identification: WINCH, HYDRAULIC, part_name_assigned_by_controlling_agency: BRAKE SPRING. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-880-7747, 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
B28L
NSN: 3120-00-880-7747
FSC: 3120
CAGE: 51588 — RBC BEARINGS INCORPORATED DIV WEST TRENTON DIVISION (USA)
SPECIFICATIONS
end_item_identificationWINCH, HYDRAULIC
part_name_assigned_by_controlling_agencyBRAKE SPRING
NSN3120-00-880-7747
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: B28L · 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 21
S308CCTLInterchangeable
interchangeable cross-reference
interchangeable
261-32-08-032Interchangeable
interchangeable cross-reference
interchangeable
G206379-4Interchangeable
interchangeable cross-reference
interchangeable
204-1-3Interchangeable
interchangeable cross-reference
interchangeable
MIL-T-55155/11Interchangeable
interchangeable cross-reference
interchangeable
6617-CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B28L?
B28L is a BEARING,PLAIN,SELF-ALIGNING.
What parts can replace B28L?
There are 21 known substitutes for B28L: S308CCTL, 261-32-08-032, G206379-4 and 18 more. Substitute compatibility should be verified for your specific system.
Is B28L still available?
B28L is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026