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AA7B309 ✓ 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: PAPER AND GLUE OVERALL, hole_diameter: 0.359 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 4.938 INCHES NOMINAL IN, style_designator: NON-CIRCULAR, aperture_diameter: 3.406 INCHES NOMINAL IN, bolt_circle_diameter: 4.250 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-358-2580, 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
AA7B309
NSN: 5330-00-358-2580
FSC: 5330
CAGE: 02978 — RENK AMERICA LLC DIV RENK AMERICA (USA)
SPECIFICATIONS
materialPAPER AND GLUE OVERALL
hole_diameter0.359 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width4.938 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
aperture_diameter3.406 INCHES NOMINAL IN
bolt_hole_quantity4
bolt_circle_diameter4.250 INCHES NOMINAL IN
outside_corner_radius0.344 INCHES NOMINAL IN
cross-sectional_thickness0.027 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
side_radius_from_gasket_center2.063 INCHES NOMINAL IN
material_document_and_classificationMIL-G-12803,+3313 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-358-2580
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AA7B309 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
•
APERTURE DIAMETER: 3.406 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
BOLT CIRCLE DIAMETER: 4.250 INCHES NOMINAL IN
•
CROSS-SECTIONAL THICKNESS: 0.027 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.359 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
BOLT HOLE QUANTITY: 4
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-12803,+3313 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
APERTURE DIAMETER3.406 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
BOLT CIRCLE DIAMETER4.250 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.027 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
HOLE DIAMETER0.359 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
BOLT HOLE QUANTITY4
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-12803,+3313 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SIDE RADIUS FROM GASKET CENTER2.063 INCHES NOMINAL IN
MATERIALPAPER AND GLUE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
2410 1-25/32Interchangeable
interchangeable cross-reference
interchangeable
T-100Interchangeable
interchangeable cross-reference
interchangeable
53214Interchangeable
interchangeable cross-reference
interchangeable
25233Interchangeable
interchangeable cross-reference
interchangeable
25233-1Interchangeable
interchangeable cross-reference
interchangeable
6515NCM116409Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AA7B309?
AA7B309 is a GASKET.
What parts can replace AA7B309?
There are 7 known substitutes for AA7B309: 2410 1-25/32, T-100, 53214 and 4 more. Substitute compatibility should be verified for your specific system.
Is AA7B309 still available?
AA7B309 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