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68-308 ✓ Verified by PartsTable
Legrand · 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 Legrand industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOAT, current_type: DC, terminal_type: STUD, overall_length: 43.750 INCHES NOMINAL IN, voltage_rating: 10.0 VOLTS MINIMUM AND 12.0 VOLTS MAXIMUM, mounting_method: BRACKET(S). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-745-7856, 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
68-308
NSN: 5340-00-745-7856
FSC: 5340
CAGE: 0AHP5 — CURTISS-WRIGHT CONTROLS, INC. DIV ACTUATION DIVISION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOAT
current_typeDC
terminal_typeSTUD
overall_length43.750 INCHES NOMINAL IN
voltage_rating10.0 VOLTS MINIMUM AND 12.0 VOLTS MAXIMUM
mounting_methodBRACKET(S)
pressure_rating400.000 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
actuation_methodFLOAT
terminal_quantity4
resistance_in_ohms15.000 PER INCH OF INDICATION
float_effective_travel33.000 INCHES NOMINAL IN
media_for_which_designedOIL
NSN5340-00-745-7856
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 68-308 MFR: Legrand ⚠ 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 9
321414Interchangeable
interchangeable cross-reference
interchangeable
96740Interchangeable
interchangeable cross-reference
interchangeable
200640Interchangeable
interchangeable cross-reference
interchangeable
14413P11Interchangeable
interchangeable cross-reference
interchangeable
68-308Interchangeable
interchangeable cross-reference
interchangeable
400-174-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 68-308?
68-308 is a O-RING manufactured by Legrand.
What parts can replace 68-308?
There are 9 known substitutes for 68-308: 321414, 96740, 200640 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 68-308?
68-308 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-745-7856. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026