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Technical Data Sheet
PartsTable / COMPONENT / 2561L
2561L ✓ 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 color: BLACK, material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL, outside_diameter: 10.875 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 0.588 INCHES NOMINAL IN, cross-sectional_thickness: 0.125 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 5330-01-417-6477, 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
2561L
NSN: 5330-01-417-6477
FSC: 5330
CAGE: 91840 — KNAPPCO CORPORATION DBA CIVACON (USA)
SPECIFICATIONS
colorBLACK
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
outside_diameter10.875 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter0.588 INCHES NOMINAL IN
cross-sectional_thickness0.125 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5330-01-417-6477
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2561L 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
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
•
CROSS-SECTIONAL THICKNESS: 0.125 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 10.875 INCHES NOMINAL IN
•
APERTURE DIAMETER: 0.588 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CIRCULAR
•
COLOR: BLACK
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
CROSS-SECTIONAL THICKNESS0.125 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER10.875 INCHES NOMINAL IN
APERTURE DIAMETER0.588 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
COLORBLACK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
356011S7Interchangeable
interchangeable cross-reference
interchangeable
356011S2Interchangeable
interchangeable cross-reference
interchangeable
11822P5Interchangeable
interchangeable cross-reference
interchangeable
2561Interchangeable
interchangeable cross-reference
interchangeable
MS35490-83Interchangeable
interchangeable cross-reference
interchangeable
5325000803487Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2561L?
2561L is a GASKET.
What parts can replace 2561L?
There are 15 known substitutes for 2561L: 356011S7, 356011S2, 11822P5 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2561L?
2561L is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-417-6477. 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