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Technical Data Sheet
PartsTable / O-RING / 2-344 N304-75
2-344 N304-75 ✓ 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 SYNTHETIC, temp_rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL, outside_diameter: 4.270 INCHES NOMINAL IN, center_hole_diameter: 3.822 INCHES MINIMUM AND 3.878 INCHES MAXIMUM IN, elongation_percentage: 125 MAXIMUM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-579-3165, 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
2-344 N304-75
NSN: 5331-00-579-3165
FSC: 5331 — O-RING
CAGE: C0308 — PARKER HANNIFIN GMBH O-RING DIVISION (DEU)
SPECIFICATIONS
materialRUBBER SYNTHETIC
temp_rating-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
hardness_rating75.0 SHORE DUROMETER A NOMINAL
outside_diameter4.270 INCHES NOMINAL IN
center_hole_diameter3.822 INCHES MINIMUM AND 3.878 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
material_document_and_classificationMIL-P-83461 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5331-00-579-3165
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2-344 N304-75 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: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 3.835 INCHES MINIMUM AND 3.865 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 4.232 INCHES MINIMUM AND 4.308 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
CENTER HOLE DIAMETER3.835 INCHES MINIMUM AND 3.865 INCHES MAXIMUM IN
OUTSIDE DIAMETER4.232 INCHES MINIMUM AND 4.308 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
422-6709-1439279ALTBPC21Interchangeable
interchangeable cross-reference
interchangeable
563-4105A930848ALT2PC9Interchangeable
interchangeable cross-reference
interchangeable
546817Interchangeable
interchangeable cross-reference
interchangeable
6227-47Interchangeable
interchangeable cross-reference
interchangeable
PRP6227-47-7-163Interchangeable
interchangeable cross-reference
interchangeable
B63117-344Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2-344 N304-75?
2-344 N304-75 is a O-RING.
What parts can replace 2-344 N304-75?
There are 13 known substitutes for 2-344 N304-75: 422-6709-1439279ALTBPC21, 563-4105A930848ALT2PC9, 546817 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2-344 N304-75?
2-344 N304-75 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-579-3165. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026