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Technical Data Sheet
PartsTable / COMPONENT / HM40818
HM40818 ✓ 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,SLEEVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, corner_shape: SQUARE OUTSIDE LEFT CORNER, flange_width: 0.3075 INCHES MINIMUM AND 0.3175 INCHES MAXIMUM IN, overall_length: 1.8700 INCHES MINIMUM AND 1.8800 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE, hardness_rating: 265.0 BRINELL STANDARD NOMINAL OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-167-8238, 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
HM40818
NSN: 3120-00-167-8238
FSC: 3120
CAGE: 53660 — HOFFERT MARINE INC (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
corner_shapeSQUARE OUTSIDE LEFT CORNER
flange_width0.3075 INCHES MINIMUM AND 0.3175 INCHES MAXIMUM IN
overall_length1.8700 INCHES MINIMUM AND 1.8800 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE
hardness_rating265.0 BRINELL STANDARD NOMINAL OVERALL
keyway_dimension1.8700 INCHES MINIMUM AND 0.8800 INCHES MAXIMUM INTERNAL KEYWAY LENGTH IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
body_inside_diameter0.8750 INCHES MINIMUM AND 0.8755 INCHES MAXIMUM IN
body_outside_diameter1.3070 INCHES MINIMUM AND 1.3080 INCHES MAXIMUM IN
flange_outside_diameter1.8075 INCHES MINIMUM AND 1.8175 INCHES MAXIMUM IN
NSN3120-00-167-8238
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: HM40818 · 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
•
CORNER SHAPE: SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
•
SURFACE FINISH: 32.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE
TECHNICAL CHARACTERISTICS (FLIS)
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
SURFACE FINISH32.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE
SURFACE FINISH125.0 MICROINCHES RIGHT END SURFACE OF BODY
SURFACE FINISH125.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF FLANGE
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPEROUND LEFT FLANGE BODY CORNER
SURFACE FINISH125.0 MICROINCHES RIGHT END SURFACE OF LEFT FLANGE
CORNER SHAPECHAMFERED INSIDE LEFT CORNER
SURFACE FINISH32.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
HARDNESS RATING265.0 BRINELL STANDARD NOMINAL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
94239Interchangeable
interchangeable cross-reference
interchangeable
40818Interchangeable
interchangeable cross-reference
interchangeable
H40818Interchangeable
interchangeable cross-reference
interchangeable
8245K3Interchangeable
interchangeable cross-reference
interchangeable
7361K5Interchangeable
interchangeable cross-reference
interchangeable
2143Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HM40818?
HM40818 is a BEARING,SLEEVE.
What parts can replace HM40818?
There are 14 known substitutes for HM40818: 94239, 40818, H40818 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HM40818?
HM40818 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-167-8238. 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