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PartsTable / COMPONENT / C18090
C18090 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: COPPER ALLOY, seat_type: GASKET, overall_length: 3.450 INCHES NOMINAL IN, end_connection_type: BRAZED, flange_outside_diameter: 4.370 INCHES NOMINAL IN, nominal_pipe_size_designation: 3.000 INCHES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-138-7476, 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
C18090
NSN: 4730-01-138-7476
FSC: 4730
CAGE: 32142 — HYDRASEARCH COMPANY, LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY
seat_typeGASKET
overall_length3.450 INCHES NOMINAL IN
end_connection_typeBRAZED
flange_outside_diameter4.370 INCHES NOMINAL IN
nominal_pipe_size_designation3.000 INCHES IN
NSN4730-01-138-7476
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: C18090 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FLANGE OUTSIDE DIAMETER: 4.370 INCHES NOMINAL IN
•
END CONNECTION TYPE: BRAZED
•
SEAT TYPE: GASKET
•
MATERIAL: COPPER ALLOY
•
NOMINAL PIPE SIZE DESIGNATION: 3.000 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE OUTSIDE DIAMETER4.370 INCHES NOMINAL IN
END CONNECTION TYPEBRAZED
SEAT TYPEGASKET
MATERIALCOPPER ALLOY
NOMINAL PIPE SIZE DESIGNATION3.000 INCHES IN
OVERALL LENGTH3.450 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
06684AInterchangeable
interchangeable cross-reference
interchangeable
137378Interchangeable
interchangeable cross-reference
interchangeable
500189Interchangeable
interchangeable cross-reference
interchangeable
070063Interchangeable
interchangeable cross-reference
interchangeable
70063Interchangeable
interchangeable cross-reference
interchangeable
5869Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C18090?
C18090 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace C18090?
There are 14 known substitutes for C18090: 06684A, 137378, 500189 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C18090?
C18090 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-138-7476. 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