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68542 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

68542: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOAT, current_type: DC, terminal_type: STUD, overall_length: 90.750 INCHES NOMINAL IN, voltage_rating: 10.0 VOLTS MINIMUM AND 12.0 VOLTS MAXIMUM, mounting_method: BRACKET(S). This part is cataloged in the U.S.

Government catalog under NSN 5331-00-405-0820, 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
68542
NSN: 5331-00-405-0820
NIINs: 004050820, 005059119, 009359196, 011726108
FSC: 5331 — O-ring
CAGE: 55799 — MINE SAFETY APPLIANCES COMPANY (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOAT
current_typeDC
terminal_typeSTUD
overall_length90.750 INCHES NOMINAL IN
voltage_rating10.0 VOLTS MINIMUM AND 12.0 VOLTS MAXIMUM
mounting_methodBRACKET(S)
pressure_rating0.000 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 400.000 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
actuation_methodFLOAT
terminal_quantity3
resistance_in_ohms5.100 PER INCH OF INDICATION
float_effective_travel51.750 INCHES NOMINAL IN
media_for_which_designedINTERFACE
NSN5331-00-405-0820
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 68542 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: 0.084 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.465 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.084 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.465 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 68542?
68542 is a O-RING.
What is the NSN for 68542?
68542 is cataloged in the U.S. Government catalog under NSN 5331-00-405-0820. 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.