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Technical Data Sheet
PartsTable / O-RING / 2661058B040
2661058B040 ✓ 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, outside_diameter: 2.978 INCHES MINIMUM AND 3.030 INCHES MAXIMUM IN, center_hole_diameter: 2.849 INCHES MINIMUM AND 2.879 INCHES MAXIMUM IN, 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 5331-00-182-3171, 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
2661058B040
NSN: 5331-00-182-3171
FSC: 5331 — O-RING
CAGE: 92003 — PARKER HANNIFIN CORPORATION DIV AEROSPACE GROUP HEADQUARTERS (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter2.978 INCHES MINIMUM AND 3.030 INCHES MAXIMUM IN
center_hole_diameter2.849 INCHES MINIMUM AND 2.879 INCHES MAXIMUM IN
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
NSN5331-00-182-3171
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2661058B040 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
•
CENTER HOLE DIAMETER: 2.849 INCHES MINIMUM AND 2.879 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
OUTSIDE DIAMETER: 2.978 INCHES MINIMUM AND 3.030 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
CENTER HOLE DIAMETER2.849 INCHES MINIMUM AND 2.879 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
OUTSIDE DIAMETER2.978 INCHES MINIMUM AND 3.030 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
2084-5044-95Interchangeable
interchangeable cross-reference
interchangeable
879-12-M09Interchangeable
interchangeable cross-reference
interchangeable
357-7448-010Interchangeable
interchangeable cross-reference
interchangeable
457-60-040Interchangeable
Same NIIN cross-reference
interchangeable
2-040N602-70Interchangeable
Same NIIN cross-reference
interchangeable
901160Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2661058B040?
2661058B040 is a O-RING.
What parts can replace 2661058B040?
There are 11 known substitutes for 2661058B040: 2084-5044-95, 879-12-M09, 357-7448-010 and 8 more. Substitute compatibility should be verified for your specific system.
Is 2661058B040 still available?
2661058B040 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