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Technical Data Sheet
PartsTable / COMPONENT / M5501/11-F12
M5501/11-F12 ✓ 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 M5501/11-F12 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 5340-00-727-4778, 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
M5501/11-F12
NSN: 5340-00-727-4778
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM5501/11-F12
NSN5340-00-727-4778
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M5501/11-F12 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
•
ROUND CAP OUTSIDE SURFACE CONDITION: RIBBED
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1-1/16-12 UN
•
INSIDE DIAMETER LENGTH: 0.780 INCHES NOMINAL IN
•
MATERIAL: PLASTIC
•
OVERALL DIAMETER: 1.180 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: L-P-390 FED SPEC SINGLE MATERIAL RESPONSE
•
DESIGN TYPE: THREADED
•
THREAD CLASS: 3B
TECHNICAL CHARACTERISTICS (FLIS)
ROUND CAP OUTSIDE SURFACE CONDITIONRIBBED
THREAD SIZE AND SERIES/TYPE DESIGNATOR1-1/16-12 UN
INSIDE DIAMETER LENGTH0.780 INCHES NOMINAL IN
MATERIALPLASTIC
OVERALL DIAMETER1.180 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONL-P-390 FED SPEC SINGLE MATERIAL RESPONSE
DESIGN TYPETHREADED
THREAD CLASS3B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
KAPPEMB10R18Upgraded Successor
successor cross-reference
successor
FC-719Upgraded Successor
successor cross-reference
successor
494115000800Upgraded Successor
successor cross-reference
successor
5340PL0169464Upgraded Successor
successor cross-reference
successor
MS25177-18Upgraded Successor
successor cross-reference
successor
025-0484-000Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M5501/11-F12?
M5501/11-F12 is a M5501/11-F12.
What parts can replace M5501/11-F12?
There are 20 known substitutes for M5501/11-F12: KAPPEMB10R18, FC-719, 494115000800 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M5501/11-F12?
M5501/11-F12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-727-4778. 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