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S2A215 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

S2A215: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include end_item_identification: HELICOPTERS (CH-53E); ISIL A00C92, part_name_assigned_by_controlling_agency: O-RING A742. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-279-9404, 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
S2A215
NSN: 5331-00-279-9404
NIINs: 002799404, 016637139
FSC: 5331 — O-ring
CAGE: 08118 — EATON AVIATION CORPORATION (USA)
SPECIFICATIONS
end_item_identificationHELICOPTERS (CH-53E); ISIL A00C92
part_name_assigned_by_controlling_agencyO-RING A742
NSN5331-00-279-9404
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: S2A215 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
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.324 INCHES NOMINAL IN
•
HARDNESS RATING: 70.0 SHORE DUROMETER A NOMINAL
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
CENTER HOLE DIAMETER: 1.036 INCHES MINIMUM AND 1.056 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROSILICONE CLASS FQ
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.324 INCHES NOMINAL IN
HARDNESS RATING70.0 SHORE DUROMETER A NOMINAL
ELONGATION PERCENTAGE125 MAXIMUM
CENTER HOLE DIAMETER1.036 INCHES MINIMUM AND 1.056 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROSILICONE CLASS FQ
SUBSTITUTES & CROSS-REFERENCES 5
MILR25988Reference document
Same NSN cross-reference
Reference document — Secondary reference
M25988/1-215ESReference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-DTL-25988/1Reference document
Same NSN cross-reference
Reference document — Identification reference
M25988/1-215Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5331PL0655015Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is S2A215?
S2A215 is a O-RING.
What parts can replace S2A215?
There are 5 known substitutes for S2A215: MILR25988, M25988/1-215ES, MIL-DTL-25988/1 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S2A215?
S2A215 is cataloged in the U.S. Government catalog under NSN 5331-00-279-9404. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.