PartsTable
Technical Data Sheet
AS3581-221 ✓ 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, special_features: OUTSIDE DIAMETER IS 1.688 INCHES NOMINAL IN, center_hole_diameter: 1.437 INCHES NOMINAL IN, cross-sectional_height: 0.125 INCHES NOMINAL IN, departure_from_cited_document: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS, criticality_code_justification: ZZZW. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-338-1382, 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
AS3581-221
NSN: 5331-00-338-1382
FSC: 5331 — O-RING
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM
special_featuresOUTSIDE DIAMETER IS 1.688 INCHES NOMINAL IN
center_hole_diameter1.437 INCHES NOMINAL IN
cross-sectional_height0.125 INCHES NOMINAL IN
departure_from_cited_documentMATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
criticality_code_justificationZZZW
part_name_assigned_by_controlling_agency(INAVY)RUBBER FLOUROCARBON ELASTOMER, HIGH TEMPERATURE, FLUID AND COMPRESSION SET RESISTANT (O-RING, CLASS 2, 90 HARDNESS)
NSN5331-00-338-1382
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS3581-221 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
CENTER HOLE DIAMETER: 1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN
OUTSIDE DIAMETER: 1.699 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
HARDNESS RATING: 90.0 SHORE DUROMETER A NOMINAL
TECHNICAL CHARACTERISTICS (FLIS)
TEMP RATING-20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
CENTER HOLE DIAMETER1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.699 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
HARDNESS RATING90.0 SHORE DUROMETER A NOMINAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
H136-094Interchangeable
interchangeable cross-reference
interchangeable
H136-94Interchangeable
interchangeable cross-reference
interchangeable
30-718Interchangeable
interchangeable cross-reference
interchangeable
17601ITEM52Interchangeable
interchangeable cross-reference
interchangeable
AS3581-221Interchangeable
interchangeable cross-reference
interchangeable
NAS1594-221Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AS3581-221?
AS3581-221 is a O-RING.
What parts can replace AS3581-221?
There are 11 known substitutes for AS3581-221: H136-094, H136-94, 30-718 and 8 more. Substitute compatibility should be verified for your specific system.
Is AS3581-221 still available?
AS3581-221 is currently cancelled.
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