PartsTable
Technical Data Sheet
PartsTable / O-RING / 7377-256
7377-256 ✓ 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 240.0 FAHRENHEIT DEGF, hardness_rating: 70.0 SHORE DUROMETER A NOMINAL, outside_diameter: 6.012 INCHES NOMINAL IN, center_hole_diameter: 5.711 INCHES MINIMUM AND 5.757 INCHES MAXIMUM IN, elongation_percentage: 160 MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-094-5959, 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
7377-256
NSN: 5331-01-094-5959
FSC: 5331 — O-RING
CAGE: 25184 — PARKER HANNIFIN CORPORATION DIV O-RING DIVISION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
temp_rating-65.0 FAHRENHEIT AND 240.0 FAHRENHEIT DEGF
hardness_rating70.0 SHORE DUROMETER A NOMINAL
outside_diameter6.012 INCHES NOMINAL IN
center_hole_diameter5.711 INCHES MINIMUM AND 5.757 INCHES MAXIMUM IN
elongation_percentage160 MAXIMUM
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-01-094-5959
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 7377-256 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
•
ELONGATION PERCENTAGE: 160 MAXIMUM
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
TEMP RATING: -65.0 FAHRENHEIT AND 240.0 FAHRENHEIT DEGF
•
HARDNESS RATING: 70.0 SHORE DUROMETER A NOMINAL
•
OUTSIDE DIAMETER: 6.012 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CENTER HOLE DIAMETER: 5.711 INCHES MINIMUM AND 5.757 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
ELONGATION PERCENTAGE160 MAXIMUM
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
TEMP RATING-65.0 FAHRENHEIT AND 240.0 FAHRENHEIT DEGF
HARDNESS RATING70.0 SHORE DUROMETER A NOMINAL
OUTSIDE DIAMETER6.012 INCHES NOMINAL IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CENTER HOLE DIAMETER5.711 INCHES MINIMUM AND 5.757 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
AS568-256Interchangeable
interchangeable cross-reference
interchangeable
ARP568-256MILP5516-90DURMInterchangeable
interchangeable cross-reference
interchangeable
AMS-5516Interchangeable
interchangeable cross-reference
interchangeable
611980-4Interchangeable
interchangeable cross-reference
interchangeable
M83248/2-256Interchangeable
interchangeable cross-reference
interchangeable
5331PL0755715Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7377-256?
7377-256 is a O-RING.
What parts can replace 7377-256?
There are 17 known substitutes for 7377-256: AS568-256, ARP568-256MILP5516-90DURM, AMS-5516 and 14 more. Substitute compatibility should be verified for your specific system.
Is 7377-256 still available?
7377-256 is currently cancelled.
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Last verified: July 2026