PartsTable
Technical Data Sheet
PartsTable / COMPONENT / M85731/1-13C
M85731/1-13C ✓ 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 M85731/1-13C 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 5340-01-257-0909, 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
M85731/1-13C
NSN: 5340-01-257-0909
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM85731/1-13C
NSN5340-01-257-0909
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M85731/1-13C 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
•
MOUNTING HOLE DIAMETER: 0.167 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
•
SURFACE TREATMENT: UNABLE TO DECODE
•
HEIGHT: 0.375 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
HOLE QUANTITY: 2
•
MOUNTING FACILITY: UNTHREADED HOLE(S)
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING HOLE DIAMETER0.167 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
SURFACE TREATMENTUNABLE TO DECODE
HEIGHT0.375 INCHES NOMINAL IN
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
OVERALL WIDTH0.936 INCHES NOMINAL IN
HOLE QUANTITY2
MOUNTING FACILITYUNTHREADED HOLE(S)
OVERALL LENGTH0.650 INCHES NOMINAL IN
STYLE DESIGNATORMORTISE
MATERIALUNABLE TO DECODE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
MIL-F-85731/1Upgraded Successor
successor cross-reference
successor
M85731/1-12Upgraded Successor
successor cross-reference
successor
402035Interchangeable
interchangeable cross-reference
interchangeable
M5212Interchangeable
interchangeable cross-reference
interchangeable
B0240411Interchangeable
interchangeable cross-reference
interchangeable
B0233448Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy M85731/1-13C?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is M85731/1-13C?
M85731/1-13C is a M85731/1-13C.
What parts can replace M85731/1-13C?
There are 8 known substitutes for M85731/1-13C: MIL-F-85731/1, M85731/1-12, 402035 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M85731/1-13C?
M85731/1-13C is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-257-0909. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — M85731/1-13C

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026