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Technical Data Sheet
PartsTable / COMPONENT / E-104,026 PART 57
E-104,026 PART 57 ✓ 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 E-104,026 PART 57 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-221-0731, 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
E-104,026 PART 57
NSN: 3120-01-221-0731
FSC: 3120
CAGE: 16603 — CONTROL FLOW, INC. DBA WESTECH HEAVY MACHINERY DIVISION DIV WESTECH HEAVY MACHINERY DIVISION (USA)
SPECIFICATIONS
Part NumberE-104,026 PART 57
NSN3120-01-221-0731
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: E-104,026 PART 57 · 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
•
MATERIAL: COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
548X071Interchangeable
interchangeable cross-reference
interchangeable
M71Interchangeable
interchangeable cross-reference
interchangeable
0388938Interchangeable
interchangeable cross-reference
interchangeable
388938Interchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-8805/58Interchangeable
interchangeable cross-reference
interchangeable
MC7711Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is E-104,026 PART 57?
E-104,026 PART 57 is a E-104,026 PART 57.
What parts can replace E-104,026 PART 57?
There are 16 known substitutes for E-104,026 PART 57: 548X071, M71, 0388938 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for E-104,026 PART 57?
E-104,026 PART 57 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-221-0731. 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