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Technical Data Sheet
PartsTable / O-RING / GS570EM261
GS570EM261 ✓ 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: 6.964 INCHES MINIMUM AND 7.060 INCHES MAXIMUM IN, center_hole_diameter: 6.711 INCHES MINIMUM AND 6.757 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-291-3275, 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
GS570EM261
NSN: 5331-00-291-3275
FSC: 5331 — O-RING
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter6.964 INCHES MINIMUM AND 7.060 INCHES MAXIMUM IN
center_hole_diameter6.711 INCHES MINIMUM AND 6.757 INCHES MAXIMUM IN
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-00-291-3275
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: GS570EM261 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
•
OUTSIDE DIAMETER: 6.964 INCHES MINIMUM AND 7.060 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 6.711 INCHES MINIMUM AND 6.757 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER6.964 INCHES MINIMUM AND 7.060 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
CENTER HOLE DIAMETER6.711 INCHES MINIMUM AND 6.757 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
HC155KANDHC162KX5Interchangeable
interchangeable cross-reference
interchangeable
D-0580Interchangeable
interchangeable cross-reference
interchangeable
HC-162K X HC-15Interchangeable
interchangeable cross-reference
interchangeable
11261Interchangeable
interchangeable cross-reference
interchangeable
4A2-1Interchangeable
interchangeable cross-reference
interchangeable
MMI8248Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GS570EM261?
GS570EM261 is a O-RING.
What parts can replace GS570EM261?
There are 18 known substitutes for GS570EM261: HC155KANDHC162KX5, D-0580, HC-162K X HC-15 and 15 more. Substitute compatibility should be verified for your specific system.
Is GS570EM261 still available?
GS570EM261 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