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Technical Data Sheet
PartsTable / COMPONENT / M85731/1-11C
M85731/1-11C ✓ 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 M85731/1-11C is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-361-3605, 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
M85731/1-11C
NSN: 5340-01-361-3605
FSC: 5340
CAGE: 14153 — DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA (USA)
SPECIFICATIONS
Part NumberM85731/1-11C
NSN5340-01-361-3605
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M85731/1-11C 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
•
STYLE DESIGNATOR: MORTISE
•
HEIGHT: 0.375 INCHES NOMINAL IN
•
MOUNTING FACILITY: UNTHREADED HOLE(S)
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
MOUNTING HOLE DIAMETER: 0.167 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
•
MATERIAL: UNABLE TO DECODE
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORMORTISE
HEIGHT0.375 INCHES NOMINAL IN
MOUNTING FACILITYUNTHREADED HOLE(S)
OVERALL LENGTH1.150 INCHES NOMINAL IN
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
OVERALL WIDTH0.438 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
MOUNTING HOLE DIAMETER0.167 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
MATERIALUNABLE TO DECODE
HOLE QUANTITY2
SURFACE TREATMENTUNABLE TO DECODE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
902005Upgraded Successor
successor cross-reference
successor
MIL-F-85731Upgraded Successor
successor cross-reference
successor
MS14108-15Upgraded Successor
successor cross-reference
successor
M85731/1-18Interchangeable
interchangeable cross-reference
interchangeable
MS14108-18Interchangeable
interchangeable cross-reference
interchangeable
M85731/1-15Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M85731/1-11C?
M85731/1-11C is a M85731/1-11C.
What parts can replace M85731/1-11C?
There are 18 known substitutes for M85731/1-11C: 902005, MIL-F-85731, MS14108-15 and 15 more. Substitute compatibility should be verified for your specific system.
Is M85731/1-11C still available?
M85731/1-11C 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