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Technical Data Sheet
PartsTable / O-RING / 2-268 N304-75
2-268 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 BUTADIENE-ACRYLONITRILE CLASS NBR, outside_diameter: 8.704 INCHES MINIMUM AND 8.820 INCHES MAXIMUM IN, center_hole_diameter: 8.454 INCHES MINIMUM AND 8.514 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-843-4837, 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
2-268 N304-75
NSN: 5331-00-843-4837
FSC: 5331 — O-RING
CAGE: C0308 — PARKER HANNIFIN GMBH O-RING DIVISION (DEU)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter8.704 INCHES MINIMUM AND 8.820 INCHES MAXIMUM IN
center_hole_diameter8.454 INCHES MINIMUM AND 8.514 INCHES MAXIMUM IN
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-00-843-4837
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2-268 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: 0.123 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.123 INCHES NOMINAL IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
AS28775-208Interchangeable
interchangeable cross-reference
interchangeable
A49370MZZInterchangeable
interchangeable cross-reference
interchangeable
N0304 2-268Interchangeable
Same NIIN cross-reference
interchangeable
ARP268N304-7Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2-268 N304-75?
2-268 N304-75 is a O-RING.
What parts can replace 2-268 N304-75?
There are 4 known substitutes for 2-268 N304-75: AS28775-208, A49370MZZ, N0304 2-268 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2-268 N304-75?
2-268 N304-75 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-843-4837. 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