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203990 — UNION,TUBE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

203990: UNION,TUBE.

The UNION,TUBE is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYTETRAFLUOROETHYLENE, inside_diameter: 3.186 INCHES MINIMUM AND 3.191 INCHES MAXIMUM IN, outside_diameter: 3.505 INCHES MINIMUM AND 3.510 INCHES MAXIMUM IN, overall_thickness: 0.030 INCHES NOMINAL IN, end_item_identification: GROUND EMPLACED MINE SCATTERING SYSTEM, material_document_and_classification: AMS 3651 ASSN STD SINGLE MATERIAL RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 5365-01-054-6511, 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
203990
NSN: 5365-01-054-6511
NIINs: 010546511, 010550108, 015083930
FSC: 5365 — Bushings, Rings, Shims, and Spacers
CAGE: 86090 — EATON CORPORATION DBA AIRFRAME DIV FUEL & MOTION CONTROL SYSTEMS (USA)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE
inside_diameter3.186 INCHES MINIMUM AND 3.191 INCHES MAXIMUM IN
outside_diameter3.505 INCHES MINIMUM AND 3.510 INCHES MAXIMUM IN
overall_thickness0.030 INCHES NOMINAL IN
end_item_identificationGROUND EMPLACED MINE SCATTERING SYSTEM
material_document_and_classificationAMS 3651 ASSN STD SINGLE MATERIAL RESPONSE
NSN5365-01-054-6511
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available UNION,TUBE TITLE COMPONENT PN 203990 MFR UNION,TUBE
KEY FEATURES
•
OUTSIDE DIAMETER: 3.505 INCHES MINIMUM AND 3.510 INCHES MAXIMUM IN
•
OVERALL THICKNESS: 0.030 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 3651 ASSN STD SINGLE MATERIAL RESPONSE
•
INSIDE DIAMETER: 3.186 INCHES MINIMUM AND 3.191 INCHES MAXIMUM IN
•
MATERIAL: PLASTIC POLYTETRAFLUOROETHYLENE
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER3.505 INCHES MINIMUM AND 3.510 INCHES MAXIMUM IN
OVERALL THICKNESS0.030 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 3651 ASSN STD SINGLE MATERIAL RESPONSE
INSIDE DIAMETER3.186 INCHES MINIMUM AND 3.191 INCHES MAXIMUM IN
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE
SUBSTITUTES & CROSS-REFERENCES 1
5365PL0688611Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 203990?
203990 is a UNION,TUBE.
What parts can replace 203990?
There is 1 known substitute for 203990: 5365PL0688611. Substitute compatibility should be verified for your specific system.
What is the NSN for 203990?
203990 is cataloged in the U.S. Government catalog under NSN 5365-01-054-6511. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.