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Technical Data Sheet
PartsTable / O-RING / G366-4
G366-4 ✓ 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 275.0 FAHRENHEIT DEGF, center_hole_diameter: 0.203 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN, elongation_percentage: 160 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 5331-00-641-0693, 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
G366-4
NSN: 5331-00-641-0693
FSC: 5331 — O-RING
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
temp_rating-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
center_hole_diameter0.203 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN
elongation_percentage160 MAXIMUM
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
NSN5331-00-641-0693
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: G366-4 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
•
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
•
CENTER HOLE DIAMETER: 0.203 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
ELONGATION PERCENTAGE: 160 MAXIMUM
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS (FLIS)
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
CENTER HOLE DIAMETER0.203 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
ELONGATION PERCENTAGE160 MAXIMUM
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
100-152Interchangeable
interchangeable cross-reference
interchangeable
347360R1Interchangeable
interchangeable cross-reference
interchangeable
07-100152Interchangeable
interchangeable cross-reference
interchangeable
9452K17-009Interchangeable
interchangeable cross-reference
interchangeable
54A125-9Interchangeable
interchangeable cross-reference
interchangeable
7377-009Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is G366-4?
G366-4 is a O-RING.
What parts can replace G366-4?
There are 21 known substitutes for G366-4: 100-152, 347360R1, 07-100152 and 18 more. Substitute compatibility should be verified for your specific system.
Is G366-4 still available?
G366-4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026