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PartsTable / COMPONENT / M550I/3-16
M550I/3-16 ✓ 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 M550I/3-16 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-682-2119, 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
M550I/3-16
NSN: 5340-00-682-2119
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM550I/3-16
NSN5340-00-682-2119
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: M550I/3-16 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
•
MATERIAL: ALUMINUM ALLOY 3003
•
SURFACE TREATMENT: ANODIZE
•
INSIDE DIAMETER LENGTH: 0.680 INCHES MINIMUM IN
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1-5/16-12 NPT
•
OVERALL DIAMETER: 1.344 INCHES MINIMUM IN
•
DESIGN TYPE: THREADED
•
SPECIFICATION/STANDARD DATA: 80205-NAS817 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/2, ALLOY 3003, TEMPER 0 FED SPEC SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALALUMINUM ALLOY 3003
SURFACE TREATMENTANODIZE
INSIDE DIAMETER LENGTH0.680 INCHES MINIMUM IN
THREAD SIZE AND SERIES/TYPE DESIGNATOR1-5/16-12 NPT
OVERALL DIAMETER1.344 INCHES MINIMUM IN
DESIGN TYPETHREADED
SPECIFICATION/STANDARD DATA80205-NAS817 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/2, ALLOY 3003, TEMPER 0 FED SPEC SINGLE MATERIAL RESPONSE
ROUND CAP OUTSIDE SURFACE CONDITIONSERRATED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
18-1112Upgraded Successor
successor cross-reference
successor
30-4138Upgraded Successor
successor cross-reference
successor
SU2307Upgraded Successor
successor cross-reference
successor
NAS817-6Upgraded Successor
successor cross-reference
successor
NAS835-6AUpgraded Successor
successor cross-reference
successor
10117546Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M550I/3-16?
M550I/3-16 is a M550I/3-16.
What parts can replace M550I/3-16?
There are 28 known substitutes for M550I/3-16: 18-1112, 30-4138, SU2307 and 25 more. Substitute compatibility should be verified for your specific system.
Is M550I/3-16 still available?
M550I/3-16 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