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Technical Data Sheet
PartsTable / COMPONENT / M85731/1-17C
M85731/1-17C ✓ 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 M85731/1-17C 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 5340-01-252-0792, 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
M85731/1-17C
NSN: 5340-01-252-0792
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM85731/1-17C
NSN5340-01-252-0792
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M85731/1-17C 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
•
KNUCKLE INSIDE DIAMETER: 0.128 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN
•
HINGE PIN: NOT INCLUDED
•
PIN CENTER TO BODY EDGE DISTANCE: 0.344 INCHES NOMINAL IN
•
MOUNTING HOLE DIAMETER: 0.195 INCHES NOMINAL IN
•
KNUCKLE TYPE: FRICTION
•
KNUCKLE QUANTITY: 2
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG LENGTH: 1.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
KNUCKLE INSIDE DIAMETER0.128 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN
OVERALL LENGTH1.500 INCHES NOMINAL IN
HINGE PINNOT INCLUDED
PIN CENTER TO BODY EDGE DISTANCE0.344 INCHES NOMINAL IN
MOUNTING HOLE DIAMETER0.195 INCHES NOMINAL IN
KNUCKLE TYPEFRICTION
KNUCKLE QUANTITY2
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG LENGTH1.000 INCHES NOMINAL IN
SPECIAL FEATURESMATES WITH -3, -4, -5, -6, AND -7 LATCH ASSEMBLY
KNUCKLE LENGTH0.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
MIL-F-85731/1Upgraded Successor
successor cross-reference
successor
M85731/1-12Upgraded Successor
successor cross-reference
successor
MS14108-17CInterchangeable
Same NIIN cross-reference
interchangeable
10113031Interchangeable
Same NIIN cross-reference
interchangeable
MIL-DTL-85731/1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M85731/1-17C?
M85731/1-17C is a M85731/1-17C.
What parts can replace M85731/1-17C?
There are 5 known substitutes for M85731/1-17C: MIL-F-85731/1, M85731/1-12, MS14108-17C and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M85731/1-17C?
M85731/1-17C is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-252-0792. 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