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333C256Q20 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

333C256Q20: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: ASBESTOS AND RUBBER SYNTHETIC OVERALL, outside_diameter: 2.531 INCHES MINIMUM AND 2.593 INCHES MAXIMUM IN, style_designator: CIRCULAR, aperture_diameter: 2.048 INCHES MINIMUM AND 2.078 INCHES MAXIMUM IN, cross-sectional_thickness: 0.031 INCHES NOMINAL IN, cross-sectional_shape_style: SOLID SINGLE OR COMPOSITION. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-148-1392, 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
333C256Q20
NSN: 5330-00-148-1392
FSC: 5330 — Packing and Gasket Materials
CAGE: 22375 — FISCHER AND PORTER CO (USA)
SPECIFICATIONS
materialASBESTOS AND RUBBER SYNTHETIC OVERALL
outside_diameter2.531 INCHES MINIMUM AND 2.593 INCHES MAXIMUM IN
style_designatorCIRCULAR
aperture_diameter2.048 INCHES MINIMUM AND 2.078 INCHES MAXIMUM IN
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5330-00-148-1392
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 333C256Q20 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: 0.031 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 2.531 INCHES MINIMUM AND 2.593 INCHES MAXIMUM IN
•
APERTURE DIAMETER: 2.048 INCHES MINIMUM AND 2.078 INCHES MAXIMUM IN
•
MATERIAL: ASBESTOS AND RUBBER SYNTHETIC OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER2.531 INCHES MINIMUM AND 2.593 INCHES MAXIMUM IN
APERTURE DIAMETER2.048 INCHES MINIMUM AND 2.078 INCHES MAXIMUM IN
MATERIALASBESTOS AND RUBBER SYNTHETIC OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
290772Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 333C256Q20?
333C256Q20 is a GASKET.
What parts can replace 333C256Q20?
There is 1 known substitute for 333C256Q20: 290772. Substitute compatibility should be verified for your specific system.
What is the NSN for 333C256Q20?
333C256Q20 is cataloged in the U.S. Government catalog under NSN 5330-00-148-1392. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.