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Technical Data Sheet
PartsTable / O-RING / 2661058B018
2661058B018 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, temp_rating: -65.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF, outside_diameter: 0.879 INCHES NOMINAL IN, center_hole_diameter: 0.734 INCHES MINIMUM AND 0.744 INCHES MAXIMUM IN, elongation_percentage: 200 MAXIMUM, cross-sectional_height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-248-3848, 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
2661058B018
NSN: 5331-00-248-3848
FSC: 5331 — O-RING
CAGE: 92003 — PARKER HANNIFIN CORPORATION DIV AEROSPACE GROUP HEADQUARTERS (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
temp_rating-65.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
outside_diameter0.879 INCHES NOMINAL IN
center_hole_diameter0.734 INCHES MINIMUM AND 0.744 INCHES MAXIMUM IN
elongation_percentage200 MAXIMUM
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
NSN5331-00-248-3848
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2661058B018 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 HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.879 INCHES NOMINAL IN
•
ELONGATION PERCENTAGE: 200 MAXIMUM
•
TEMP RATING: -65.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
•
CENTER HOLE DIAMETER: 0.734 INCHES MINIMUM AND 0.744 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.879 INCHES NOMINAL IN
ELONGATION PERCENTAGE200 MAXIMUM
TEMP RATING-65.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
CENTER HOLE DIAMETER0.734 INCHES MINIMUM AND 0.744 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
3-66391Interchangeable
interchangeable cross-reference
interchangeable
00520Interchangeable
interchangeable cross-reference
interchangeable
503-S 57Interchangeable
interchangeable cross-reference
interchangeable
350-RTInterchangeable
interchangeable cross-reference
interchangeable
44127Interchangeable
interchangeable cross-reference
interchangeable
9937B406Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2661058B018?
2661058B018 is a O-RING.
What parts can replace 2661058B018?
There are 28 known substitutes for 2661058B018: 3-66391, 00520, 503-S 57 and 25 more. Substitute compatibility should be verified for your specific system.
Is 2661058B018 still available?
2661058B018 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