PartsTable
Technical Data Sheet
218131798 ✓ 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. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-734-3231, 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
218131798
NSN: 5331-01-734-3231
FSC: 5331 — O-RING
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
Part Number218131798
NSN5331-01-734-3231
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 218131798 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
MILG21610TYPEIInterchangeable
interchangeable cross-reference
interchangeable
AS568-221Interchangeable
interchangeable cross-reference
interchangeable
AS568B-221Interchangeable
interchangeable cross-reference
interchangeable
0221-8307Interchangeable
interchangeable cross-reference
interchangeable
221-8307Interchangeable
interchangeable cross-reference
interchangeable
4-2406-32AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 218131798?
218131798 is a O-RING.
What parts can replace 218131798?
There are 10 known substitutes for 218131798: MILG21610TYPEI, AS568-221, AS568B-221 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 218131798?
218131798 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-734-3231. This indicates validated use in U.S. government and defense supply chains.
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