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S30540 ✓ 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, hole_diameter: 0.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, outside_diameter: 3.938 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN, style_designator: CIRCULAR, aperture_diameter: 2.500 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN, bolt_circle_diameter: 3.343 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-579-7831, 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
S30540
NSN: 5330-00-579-7831
FSC: 5330
CAGE: 80212 — BAE SYSTEMS LAND & ARMAMENTS L.P. (USA)
SPECIFICATIONS
materialASBESTOS OVERALL
hole_diameter0.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
outside_diameter3.938 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN
style_designatorCIRCULAR
aperture_diameter2.500 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN
bolt_hole_quantity4
bolt_circle_diameter3.343 INCHES NOMINAL IN
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5330-00-579-7831
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: S30540 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
•
BOLT HOLE QUANTITY: 4
•
OUTSIDE DIAMETER: 3.938 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN
•
APERTURE DIAMETER: 2.500 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN
•
BOLT CIRCLE DIAMETER: 3.343 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CIRCULAR
•
CROSS-SECTIONAL THICKNESS: 0.031 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
BOLT HOLE QUANTITY4
OUTSIDE DIAMETER3.938 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN
APERTURE DIAMETER2.500 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN
BOLT CIRCLE DIAMETER3.343 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
HOLE DIAMETER0.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
MATERIALASBESTOS OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
50022Interchangeable
interchangeable cross-reference
interchangeable
95069HAXInterchangeable
interchangeable cross-reference
interchangeable
2868321-1Interchangeable
interchangeable cross-reference
interchangeable
10307Interchangeable
interchangeable cross-reference
interchangeable
SC-C-69992-1Interchangeable
interchangeable cross-reference
interchangeable
48627Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S30540?
S30540 is a GASKET.
What parts can replace S30540?
There are 15 known substitutes for S30540: 50022, 95069HAX, 2868321-1 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S30540?
S30540 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-579-7831. 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