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M85731/1-7CP ✓ 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 M85731/1-7CP is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-086-3774, 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
M85731/1-7CP
NSN: 5340-01-086-3774
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM85731/1-7CP
NSN5340-01-086-3774
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M85731/1-7CP 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
•
THREAD SERIES DESIGNATOR: UNF
•
STYLE DESIGNATOR: KNURLED NO. 2
•
MOUNTING METHOD: PIN(S)
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 28
•
THREAD CLASS: 3A A
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNF
STYLE DESIGNATORKNURLED NO. 2
MOUNTING METHODPIN(S)
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH28
SPECIAL FEATURESINCLUDES SELF-POSITIONING FEATURE
THREAD CLASS3A A
NOMINAL THREAD SIZE0.250 INCHES IN
MATERIALUNABLE TO DECODE
THREAD LENGTH1.875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
MIL-F-85731/1Upgraded Successor
successor cross-reference
successor
M85731/1-12Upgraded Successor
successor cross-reference
successor
MIL-DTL-85731/1Interchangeable
Same NIIN cross-reference
interchangeable
MS14108-7CPInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M85731/1-7CP?
M85731/1-7CP is a M85731/1-7CP.
What parts can replace M85731/1-7CP?
There are 4 known substitutes for M85731/1-7CP: MIL-F-85731/1, M85731/1-12, MIL-DTL-85731/1 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M85731/1-7CP?
M85731/1-7CP is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-086-3774. 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