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Technical Data Sheet
PartsTable / O-RING / AMS7259
AMS7259 ✓ 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 FLUOROCARBON CLASS FPM, temp_rating: -15.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF, hardness_rating: 85.0 SHORE DUROMETER A MINIMUM AND 95.0 SHORE DUROMETER A MAXIMUM, special_features: M83248/2 SUPERSEDED BY AS3209, center_hole_diameter: 0.667 INCHES MINIMUM AND 0.685 INCHES MAXIMUM IN, cross-sectional_height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN.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 5331-00-001-6681, 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
AMS7259
NSN: 5331-00-001-6681
FSC: 5331 — O-RING
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM
temp_rating-15.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
hardness_rating85.0 SHORE DUROMETER A MINIMUM AND 95.0 SHORE DUROMETER A MAXIMUM
special_featuresM83248/2 SUPERSEDED BY AS3209
center_hole_diameter0.667 INCHES MINIMUM AND 0.685 INCHES MAXIMUM IN
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
end_item_identificationDRY DECK SHELTER O2 PRESSURE REDUCING MANIFOLD (MB-74)
specification/standard_data03950-AS3209 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
departure_from_cited_documentCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
criticality_code_justificationZZZY
material_document_and_classificationSAE AMS7259 ASSN STD SINGLE MATERIAL RESPONSE
reference_number_differentiating_characteristicsCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D.
NSN5331-00-001-6681
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AMS7259 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: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
•
HARDNESS RATING: 90.0 SHORE DUROMETER A NOMINAL
•
OUTSIDE DIAMETER: 3.693 INCHES NOMINAL IN
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
•
CENTER HOLE DIAMETER: 3.463 INCHES MINIMUM AND 3.511 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
TEMP RATING-20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
HARDNESS RATING90.0 SHORE DUROMETER A NOMINAL
OUTSIDE DIAMETER3.693 INCHES NOMINAL IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
CENTER HOLE DIAMETER3.463 INCHES MINIMUM AND 3.511 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
M83248/2-153Interchangeable
Same NIIN cross-reference
interchangeable
MILR-83248/2Interchangeable
Same NIIN cross-reference
interchangeable
AS3581-153Interchangeable
Same NIIN cross-reference
interchangeable
NAS1594-153Interchangeable
Same NIIN cross-reference
interchangeable
SAE-AS3581Interchangeable
Same NIIN cross-reference
interchangeable
R1312P153Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AMS7259?
AMS7259 is a O-RING.
What parts can replace AMS7259?
There are 6 known substitutes for AMS7259: M83248/2-153, MILR-83248/2, AS3581-153 and 3 more. Substitute compatibility should be verified for your specific system.
Is AMS7259 still available?
AMS7259 is currently cancelled.
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Last verified: July 2026