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1030556 — PLATE,RETAINING,BEARING

✓ Government record, cited
3M · TAPERED BEARING
PRODUCT OVERVIEW

1030556: PLATE,RETAINING,BEARING.

The PLATE,RETAINING,BEARING is a 3M industrial component. Key specifications include material: STEEL COMP 303 OVERALL, body_diameter: 1.125 INCHES NOMINAL IN, body_thickness: 0.125 INCHES NOMINAL IN, minor_thickness: 0.556 INCHES NOMINAL IN, outside_diameter: 1.8126 INCHES MINIMUM AND 1.8438 INCHES MAXIMUM IN, style_designator: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-073-3732, 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
1030556
NSN: 3110-00-073-3732
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
body_diameter1.125 INCHES NOMINAL IN
body_thickness0.125 INCHES NOMINAL IN
minor_thickness0.556 INCHES NOMINAL IN
outside_diameter1.8126 INCHES MINIMUM AND 1.8438 INCHES MAXIMUM IN
style_designatorROUND
aperture_diameter0.578 INCHES NOMINAL IN
counterbore_depth0.5625 INCHES NOMINAL IN
overall_thickness0.681 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
mounting_hole_typeROUND, UNTHREADED
counterbore_diameter0.875 INCHES MINIMUM AND 0.879 INCHES MAXIMUM IN
NSN3110-00-073-3732
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 1030556 · 3M ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
BODY DIAMETER: 1.125 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: NAVORD CD7690,SPEC -69510,CAGEC 56232 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
MINOR THICKNESS: 0.556 INCHES NOMINAL IN
•
BOLT CIRCLE HOLE QUANTITY: 4
•
MOUNTING HOLE TYPE: ROUND, UNTHREADED
•
COUNTERBORE DIAMETER: 0.875 INCHES MINIMUM AND 0.879 INCHES MAXIMUM IN
•
COUNTERBORE DEPTH: 0.5625 INCHES NOMINAL IN
•
MOUNTING HOLE ARRANGEMENT STYLE: SINGLE BOLT HOLE CIRCLE
TECHNICAL CHARACTERISTICS
BODY DIAMETER1.125 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONNAVORD CD7690,SPEC -69510,CAGEC 56232 MFR REF SINGLE TREATMENT RESPONSE OVERALL
MINOR THICKNESS0.556 INCHES NOMINAL IN
BOLT CIRCLE HOLE QUANTITY4
MOUNTING HOLE TYPEROUND, UNTHREADED
COUNTERBORE DIAMETER0.875 INCHES MINIMUM AND 0.879 INCHES MAXIMUM IN
COUNTERBORE DEPTH0.5625 INCHES NOMINAL IN
MOUNTING HOLE ARRANGEMENT STYLESINGLE BOLT HOLE CIRCLE
OVERALL THICKNESS0.681 INCHES NOMINAL IN
STYLE DESIGNATORROUND
SUBSTITUTES & CROSS-REFERENCES 1
1858021Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is 1030556?
1030556 is a PLATE,RETAINING,BEARING manufactured by 3M.
What parts can replace 1030556?
There is 1 known substitute for 1030556: 1858021. Substitute compatibility should be verified for your specific system.
What is the NSN for 1030556?
1030556 is cataloged in the U.S. Government catalog under NSN 3110-00-073-3732. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.