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C4WM1091-1 — BUSHING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

C4WM1091-1: BUSHING,SLEEVE.

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, corner_shape: CHAMFERED OUTSIDE LEFT CORNER, flange_width: 0.3130 INCHES NOMINAL IN, overall_length: 0.8630 INCHES NOMINAL IN, surface_finish: 125.0 MICROINCHES OVERALL, style_designator: SOLID, EXTERNAL FLANGE ONE END. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-893-2557, 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
C4WM1091-1
NSN: 3120-00-893-2557
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 71867 — DE HAVILLAND AIRCRAFT OF CANADA LIMITED (CAN)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
corner_shapeCHAMFERED OUTSIDE LEFT CORNER
flange_width0.3130 INCHES NOMINAL IN
overall_length0.8630 INCHES NOMINAL IN
surface_finish125.0 MICROINCHES OVERALL
style_designatorSOLID, EXTERNAL FLANGE ONE END
surface_treatmentCADMIUM OVERALL
body_inside_diameter0.3120 INCHES MINIMUM AND 0.3130 INCHES MAXIMUM IN
body_outside_diameter0.3756 INCHES MINIMUM AND 0.3761 INCHES MAXIMUM IN
flange_outside_diameter0.5750 INCHES NOMINAL IN
material_document_and_classificationMIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN3120-00-893-2557
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: C4WM1091-1 · 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
•
SURFACE FINISH: 125.0 MICROINCHES OVERALL
•
CORNER SHAPE: SQUARE INSIDE RIGHT CORNER
•
FLANGE OUTSIDE DIAMETER: 0.5750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES OVERALL
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE INSIDE LEFT CORNER
CORNER SHAPECHAMFERED OUTSIDE LEFT CORNER
CORNER SHAPEROUND LEFT FLANGE BODY CORNER
FLANGE OUTSIDE DIAMETER0.5750 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.3756 INCHES MINIMUM AND 0.3761 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
SUBSTITUTES & CROSS-REFERENCES 1
C3121Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C4WM1091-1?
C4WM1091-1 is a BUSHING,SLEEVE.
What parts can replace C4WM1091-1?
There is 1 known substitute for C4WM1091-1: C3121. Substitute compatibility should be verified for your specific system.
What is the NSN for C4WM1091-1?
C4WM1091-1 is cataloged in the U.S. Government catalog under NSN 3120-00-893-2557. 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.