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PartsTable / O-RING / AS568-238
AS568-238 ✓ 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 ETHYLENE-PROPYLENE CLASS EPM, center_hole_diameter: 3.460 INCHES MINIMUM AND 3.508 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN, material_document_and_classification: MIL-G-22050 MIL SPEC SINGLE MATERIAL RESPONSE, part_name_assigned_by_controlling_agency: O-RING. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-171-6411, 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
AS568-238
NSN: 5331-00-171-6411
FSC: 5331 — O-RING
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialRUBBER ETHYLENE-PROPYLENE CLASS EPM
center_hole_diameter3.460 INCHES MINIMUM AND 3.508 INCHES MAXIMUM IN
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
material_document_and_classificationMIL-G-22050 MIL SPEC SINGLE MATERIAL RESPONSE
part_name_assigned_by_controlling_agencyO-RING
NSN5331-00-171-6411
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS568-238 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: 3.762 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 3.460 INCHES MINIMUM AND 3.508 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CROSS-SECTIONAL HEIGHT: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER3.762 INCHES NOMINAL IN
CENTER HOLE DIAMETER3.460 INCHES MINIMUM AND 3.508 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CROSS-SECTIONAL HEIGHT0.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
938284631U01Interchangeable
interchangeable cross-reference
interchangeable
D3114650AInterchangeable
interchangeable cross-reference
interchangeable
AS568-238Interchangeable
interchangeable cross-reference
interchangeable
58094Interchangeable
interchangeable cross-reference
interchangeable
D2000-05 2BG715E034EF11EF21F1Interchangeable
interchangeable cross-reference
interchangeable
400-221P42Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AS568-238?
AS568-238 is a O-RING.
What parts can replace AS568-238?
There are 13 known substitutes for AS568-238: 938284631U01, D3114650A, AS568-238 and 10 more. Substitute compatibility should be verified for your specific system.
Is AS568-238 still available?
AS568-238 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