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Technical Data Sheet

SE121N FN-51 SHT 3 — Technical Data Sheet

✓ 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 part is cataloged in the Federal Logistics Information System under NSN 5331-00-166-1063, 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
SE121N FN-51 SHT 3
NSN: 5331-00-166-1063
FSC: 5331 — O-RING
CAGE: 56349 — TRI-TEC MANUFACTURING, LLC (USA)
SPECIFICATIONS
Part NumberSE121N FN-51 SHT 3
NSN5331-00-166-1063
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SE121N FN-51 SHT 3 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 39
AS3209-114InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
56555AInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SC-B-70399InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SM-B-171471InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
PLC-11749 ITEMInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
000114EEInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SE121N FN-51 SHT 3?
SE121N FN-51 SHT 3 is a O-RING.
What parts can replace SE121N FN-51 SHT 3?
There are 39 known substitutes for SE121N FN-51 SHT 3: AS3209-114, 56555A, SC-B-70399 and 36 more. Substitute compatibility should be verified for your specific system.
Is SE121N FN-51 SHT 3 still available?
SE121N FN-51 SHT 3 is currently cancelled.
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