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Technical Data Sheet
PartsTable / O-RING / 2-237 N304-75
2-237 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: 3.605 INCHES MINIMUM AND 3.669 INCHES MAXIMUM IN, center_hole_diameter: 3.344 INCHES MINIMUM AND 3.374 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN, material_document_and_classification: MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-608-6432, 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
2-237 N304-75
NSN: 5331-00-608-6432
FSC: 5331 — O-RING
CAGE: C0308 — PARKER HANNIFIN GMBH O-RING DIVISION (DEU)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter3.605 INCHES MINIMUM AND 3.669 INCHES MAXIMUM IN
center_hole_diameter3.344 INCHES MINIMUM AND 3.374 INCHES MAXIMUM IN
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
material_document_and_classificationMIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5331-00-608-6432
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2-237 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
•
OUTSIDE DIAMETER: 3.605 INCHES MINIMUM AND 3.669 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 3.344 INCHES MINIMUM AND 3.374 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER3.605 INCHES MINIMUM AND 3.669 INCHES MAXIMUM IN
CENTER HOLE DIAMETER3.344 INCHES MINIMUM AND 3.374 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
A6689-237-142Interchangeable
interchangeable cross-reference
interchangeable
5331PL1333991Interchangeable
interchangeable cross-reference
interchangeable
A06689.237.142Interchangeable
interchangeable cross-reference
interchangeable
897Interchangeable
interchangeable cross-reference
interchangeable
200-004Interchangeable
interchangeable cross-reference
interchangeable
165-336-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2-237 N304-75?
2-237 N304-75 is a O-RING.
What parts can replace 2-237 N304-75?
There are 23 known substitutes for 2-237 N304-75: A6689-237-142, 5331PL1333991, A06689.237.142 and 20 more. Substitute compatibility should be verified for your specific system.
Is 2-237 N304-75 still available?
2-237 N304-75 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