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Technical Data Sheet
PartsTable / COMPONENT / 31A811-4G
31A811-4G ✓ 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 OVERALL, outside_diameter: 0.750 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 0.438 INCHES NOMINAL IN, cross-sectional_thickness: 0.312 INCHES NOMINAL IN, cross-sectional_shape_style: SOLID SINGLE OR COMPOSITION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-530-2804, 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
31A811-4G
NSN: 5330-00-530-2804
FSC: 5330
CAGE: 27996 — HEIL ENVIRONMENTAL INDUSTRIES (USA)
SPECIFICATIONS
materialASBESTOS OVERALL
outside_diameter0.750 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter0.438 INCHES NOMINAL IN
cross-sectional_thickness0.312 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5330-00-530-2804
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 31A811-4G 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 THICKNESS: 0.312 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 0.750 INCHES NOMINAL IN
•
APERTURE DIAMETER: 0.438 INCHES NOMINAL IN
•
MATERIAL: ASBESTOS OVERALL
•
STYLE DESIGNATOR: CIRCULAR
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL THICKNESS0.312 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER0.750 INCHES NOMINAL IN
APERTURE DIAMETER0.438 INCHES NOMINAL IN
MATERIALASBESTOS OVERALL
STYLE DESIGNATORCIRCULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
10SInterchangeable
interchangeable cross-reference
interchangeable
1921Interchangeable
interchangeable cross-reference
interchangeable
241-FInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31A811-4G?
31A811-4G is a GASKET.
What parts can replace 31A811-4G?
There are 3 known substitutes for 31A811-4G: 10S, 1921, 241-F. Substitute compatibility should be verified for your specific system.
What is the NSN for 31A811-4G?
31A811-4G is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-530-2804. 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