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Technical Data Sheet
PartsTable / O-RING / 12,42X1,78-24B7
12,42X1,78-24B7 ✓ 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 12,42X1,78-24B7 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-584-1840, 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
12,42X1,78-24B7
NSN: 5331-00-584-1840
FSC: 5331 — O-RING
CAGE: F0229 — LE JOINT FRANCAIS (FRA)
SPECIFICATIONS
Part Number12,42X1,78-24B7
NSN5331-00-584-1840
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12,42X1,78-24B7 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
•
OUTSIDE DIAMETER: 0.618 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.484 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN
•
TEMP RATING: 275.0 FAHRENHEIT DEGF
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.618 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.484 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN
TEMP RATING275.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
58-014-30Interchangeable
interchangeable cross-reference
interchangeable
ARP568-014MILP5 516-90DURMInterchangeable
interchangeable cross-reference
interchangeable
ARP568-014MILP5516CLASSAInterchangeable
interchangeable cross-reference
interchangeable
914-2Interchangeable
interchangeable cross-reference
interchangeable
014-7377Interchangeable
interchangeable cross-reference
interchangeable
A131N014Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12,42X1,78-24B7?
12,42X1,78-24B7 is a 12,42X1,78-24B7.
What parts can replace 12,42X1,78-24B7?
There are 27 known substitutes for 12,42X1,78-24B7: 58-014-30, ARP568-014MILP5 516-90DURM, ARP568-014MILP5516CLASSA and 24 more. Substitute compatibility should be verified for your specific system.
Is 12,42X1,78-24B7 still available?
12,42X1,78-24B7 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026