PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 34U3-203
34U3-203 ✓ 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 UNIT,BALL is a the manufacturer industrial component. Key specifications include material: IRON CAST HOUSING, block_type: FIXED, bore_diameter: 1.4375 INCHES NOMINAL IN, housing_width: 4.6250 INCHES NOMINAL IN, alignment_type: RIGID, housing_length: 2.2969 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3130-01-153-0971, 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
34U3-203
NSN: 3130-01-153-0971
FSC: 3130
CAGE: 19382 — REXNORD INDUSTRIES, LLC DIV LINK-BELT BEARING OPERATION (USA)
SPECIFICATIONS
materialIRON CAST HOUSING
block_typeFIXED
bore_diameter1.4375 INCHES NOMINAL IN
housing_width4.6250 INCHES NOMINAL IN
alignment_typeRIGID
housing_length2.2969 INCHES NOMINAL IN
shaft_end_typeCLOSED OR OPEN
flange_thickness0.0625 INCHES NOMINAL IN
style_designatorFLANGE BLOCK
features_providedGROUND ROLLING ELEMENT GROOVE
mounting_hole_typeROUND, UNTHREADED
bolt_circle_diameter3.6250 INCHES NOMINAL IN
NSN3130-01-153-0971
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 34U3-203 · 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
•
HOUSING WIDTH: 4.6250 INCHES NOMINAL IN
•
BLOCK TYPE: FIXED
•
ROTATING ELEMENT LOCKING METHOD: DIRECT
•
FEATURES PROVIDED: GROUND ROLLING ELEMENT GROOVE
•
ROLLING ELEMENT GROOVE QUANTITY: 1
•
ASSEMBLY OVERALL LENGTH: 6.1250 INCHES NOMINAL IN
•
MATERIAL: IRON CAST HOUSING
•
STYLE DESIGNATOR: FLANGE BLOCK
TECHNICAL CHARACTERISTICS (FLIS)
HOUSING WIDTH4.6250 INCHES NOMINAL IN
BLOCK TYPEFIXED
ROTATING ELEMENT LOCKING METHODDIRECT
FEATURES PROVIDEDGROUND ROLLING ELEMENT GROOVE
ROLLING ELEMENT GROOVE QUANTITY1
ASSEMBLY OVERALL LENGTH6.1250 INCHES NOMINAL IN
MATERIALIRON CAST HOUSING
STYLE DESIGNATORFLANGE BLOCK
MATERIALSTEEL BALL
HOUSING LENGTH2.2969 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
800-30Interchangeable
interchangeable cross-reference
interchangeable
F3U223HInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 34U3-203?
34U3-203 is a BEARING UNIT,BALL.
What parts can replace 34U3-203?
There are 2 known substitutes for 34U3-203: 800-30, F3U223H. Substitute compatibility should be verified for your specific system.
What is the NSN for 34U3-203?
34U3-203 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3130-01-153-0971. 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