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Technical Data Sheet
PartsTable / COMPONENT / 3251C
3251C ✓ 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,WASHER,THRUST is a the manufacturer industrial component. Key specifications include diameter: 2.9375 INCHES NOMINAL IN, material: COPPER ALLOY 937 OVERALL, corner_shape: SQUARE ALL CORNERS, outside_diameter: 6.0000 INCHES NOMINAL IN, style_designator: ROUND, overall_thickness: 0.2500 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 3120-00-378-9717, 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
3251C
NSN: 3120-00-378-9717
FSC: 3120
CAGE: 38018 — MANITOWOC ENGINEERING CO DIVISION OF THE MANITOWOC CO INC (USA)
SPECIFICATIONS
diameter2.9375 INCHES NOMINAL IN
materialCOPPER ALLOY 937 OVERALL
corner_shapeSQUARE ALL CORNERS
outside_diameter6.0000 INCHES NOMINAL IN
style_designatorROUND
overall_thickness0.2500 INCHES NOMINAL IN
lubrication_featureGROOVE FLAT BEARING SURFACE
center_hole_shape_styleROUND W/KEYWAY
center_hole_keyway_depth0.1250 INCHES NOMINAL IN
center_hole_keyway_width0.3750 INCHES NOMINAL IN
center_hole_keyway_quantity2
cross-sectional_shape_styleRECTANGULAR
NSN3120-00-378-9717
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 3251C · 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
•
STYLE DESIGNATOR: ROUND
•
CENTER HOLE KEYWAY DEPTH: 0.1250 INCHES NOMINAL IN
•
LUBRICATION FEATURE: GROOVE FLAT BEARING SURFACE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL: COPPER ALLOY 937 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND W/KEYWAY
•
OUTSIDE DIAMETER: 6.0000 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORROUND
CENTER HOLE KEYWAY DEPTH0.1250 INCHES NOMINAL IN
LUBRICATION FEATUREGROOVE FLAT BEARING SURFACE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIALCOPPER ALLOY 937 OVERALL
CENTER HOLE SHAPE STYLEROUND W/KEYWAY
OUTSIDE DIAMETER6.0000 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CENTER HOLE KEYWAY QUANTITY2
DIAMETER2.9375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
325-1Interchangeable
interchangeable cross-reference
interchangeable
AB335-1-1Interchangeable
interchangeable cross-reference
interchangeable
332-2723-010Interchangeable
interchangeable cross-reference
interchangeable
B2928-19Interchangeable
interchangeable cross-reference
interchangeable
SM-B-78757Interchangeable
interchangeable cross-reference
interchangeable
MIL-R-25134Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3251C?
3251C is a BEARING,WASHER,THRUST.
What parts can replace 3251C?
There are 16 known substitutes for 3251C: 325-1, AB335-1-1, 332-2723-010 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3251C?
3251C is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-378-9717. 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