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PartsTable / COMPONENT / 40028A
40028A ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The GASKET is a the manufacturer industrial component. Key specifications include material: ASBESTOS AND COPPER OVERALL, outside_diameter: 3.000 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 2.500 INCHES NOMINAL IN, cross-sectional_thickness: 0.500 INCHES NOMINAL IN, cross-sectional_shape_style: METAL WITH SOFT FILLER. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-599-5491, 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
40028A
NSN: 5330-00-599-5491
FSC: 5330
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
materialASBESTOS AND COPPER OVERALL
outside_diameter3.000 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter2.500 INCHES NOMINAL IN
cross-sectional_thickness0.500 INCHES NOMINAL IN
cross-sectional_shape_styleMETAL WITH SOFT FILLER
NSN5330-00-599-5491
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 40028A MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
APERTURE DIAMETER: 2.500 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: METAL WITH SOFT FILLER
•
CROSS-SECTIONAL THICKNESS: 0.500 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 3.000 INCHES NOMINAL IN
•
MATERIAL: ASBESTOS AND COPPER OVERALL
•
STYLE DESIGNATOR: CIRCULAR
TECHNICAL CHARACTERISTICS (FLIS)
APERTURE DIAMETER2.500 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEMETAL WITH SOFT FILLER
CROSS-SECTIONAL THICKNESS0.500 INCHES NOMINAL IN
OUTSIDE DIAMETER3.000 INCHES NOMINAL IN
MATERIALASBESTOS AND COPPER OVERALL
STYLE DESIGNATORCIRCULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
W2-F-009 ITEM 34Interchangeable
interchangeable cross-reference
interchangeable
W2-F-009-34Interchangeable
interchangeable cross-reference
interchangeable
6207ARSInterchangeable
interchangeable cross-reference
interchangeable
9457REVAITEM12Interchangeable
interchangeable cross-reference
interchangeable
9507Interchangeable
interchangeable cross-reference
interchangeable
9457REVAITEM124Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40028A?
40028A is a GASKET.
What parts can replace 40028A?
There are 14 known substitutes for 40028A: W2-F-009 ITEM 34, W2-F-009-34, 6207ARS and 11 more. Substitute compatibility should be verified for your specific system.
Is 40028A still available?
40028A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026