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Technical Data Sheet
PartsTable / COMPONENT / 28-540PK
28-540PK ✓ 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: CELLULOSE OVERALL, outside_diameter: 2.750 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 2.125 INCHES NOMINAL IN, cross-sectional_thickness: 0.062 INCHES NOMINAL IN, cross-sectional_shape_style: SOLID SINGLE OR COMPOSITION. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-641-4439, 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
28-540PK
NSN: 5330-00-641-4439
FSC: 5330
CAGE: 66935 — JOHNSON CONTROLS NAVY SYSTEMS, LLC (USA)
SPECIFICATIONS
materialCELLULOSE OVERALL
outside_diameter2.750 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter2.125 INCHES NOMINAL IN
cross-sectional_thickness0.062 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5330-00-641-4439
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 28-540PK 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
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 2.750 INCHES NOMINAL IN
•
APERTURE DIAMETER: 2.125 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CIRCULAR
•
CROSS-SECTIONAL THICKNESS: 0.062 INCHES NOMINAL IN
•
MATERIAL: CELLULOSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER2.750 INCHES NOMINAL IN
APERTURE DIAMETER2.125 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
CROSS-SECTIONAL THICKNESS0.062 INCHES NOMINAL IN
MATERIALCELLULOSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
12303974Interchangeable
interchangeable cross-reference
interchangeable
CE304656QInterchangeable
interchangeable cross-reference
interchangeable
313970-1Interchangeable
interchangeable cross-reference
interchangeable
028540Interchangeable
interchangeable cross-reference
interchangeable
28540Interchangeable
interchangeable cross-reference
interchangeable
1ARX7Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28-540PK?
28-540PK is a GASKET.
What parts can replace 28-540PK?
There are 14 known substitutes for 28-540PK: 12303974, CE304656Q, 313970-1 and 11 more. Substitute compatibility should be verified for your specific system.
Is 28-540PK still available?
28-540PK 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