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Technical Data Sheet
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728590 ✓ 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: ALUMINUM ALLOY 6061 OR RUBBER FLUOROSILICONE CLASS FQ OVERALL, special_features: 2 BOLT HOLES .205 IN. DIA.

AND 6 BOLT HOLES .325 IN. DIA. IN, aperture_diameter: 2.860 INCHES NOMINAL IN, surface_treatment: ANODIZE OVERALL, bolt_circle_diameter: 3.812 INCHES NOMINAL IN, elongation_percentage: 125 MAXIMUM.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-043-5833, 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
728590
NSN: 5330-01-043-5833
FSC: 5330
CAGE: 83259 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV COMPOSITE SEALING SYSTEMS DIVISION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OR RUBBER FLUOROSILICONE CLASS FQ OVERALL
special_features2 BOLT HOLES .205 IN. DIA. AND 6 BOLT HOLES .325 IN. DIA. IN
aperture_diameter2.860 INCHES NOMINAL IN
surface_treatmentANODIZE OVERALL
bolt_hole_quantity8
bolt_circle_diameter3.812 INCHES NOMINAL IN
elongation_percentage125 MAXIMUM
material_document_and_classificationQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE OR MIL-R-25988 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5330-01-043-5833
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 728590 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: 2.860 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: ALUMINUM ALLOY 6061 OR RUBBER FLUOROSILICONE CLASS FQ OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE OR MIL-R-25988 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
BOLT CIRCLE DIAMETER: 3.812 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 8
•
ELONGATION PERCENTAGE: 125 MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
APERTURE DIAMETER2.860 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALALUMINUM ALLOY 6061 OR RUBBER FLUOROSILICONE CLASS FQ OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE OR MIL-R-25988 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
BOLT CIRCLE DIAMETER3.812 INCHES NOMINAL IN
SPECIAL FEATURES2 BOLT HOLES .205 IN. DIA. AND 6 BOLT HOLES .325 IN. DIA. IN
BOLT HOLE QUANTITY8
ELONGATION PERCENTAGE125 MAXIMUM
SURFACE TREATMENTANODIZE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
40534Interchangeable
interchangeable cross-reference
interchangeable
ASME B94.19Interchangeable
interchangeable cross-reference
interchangeable
1561-0625Interchangeable
interchangeable cross-reference
interchangeable
53410Interchangeable
interchangeable cross-reference
interchangeable
40533Interchangeable
interchangeable cross-reference
interchangeable
40533CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 728590?
728590 is a GASKET.
What parts can replace 728590?
There are 21 known substitutes for 728590: 40534, ASME B94.19, 1561-0625 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 728590?
728590 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-043-5833. 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