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18355-9 — TUBE ASSEMBLY,METAL

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

18355-9: TUBE ASSEMBLY,METAL.

The TUBE ASSEMBLY,METAL is a the manufacturer industrial component. Key specifications include material: STEEL SINGLE ENDSTEEL SINGLE END, design_form: PREBENTPREBENT, seat_radius: 0.010 INCHES NOMINAL SINGLE END0.010 INCHES NOMINAL SINGLE END IN, thread_class: 3B SINGLE END3B SINGLE END, wall_thickness: 0.035 INCHES NOMINAL0.035 INCHES NOMINAL IN, thread_direction: RIGHT-HAND SINGLE ENDRIGHT-HAND SINGLE END. This part is cataloged in the U.S.

Government catalog under NSN 4710-00-654-6733, 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
18355-9
NSN: 4710-00-654-6733
FSC: 4710 — Pipe, Tube and Rigid Tubing
CAGE: 55345 — ALAMO AIRCRAFT, LTD. (USA)
SPECIFICATIONS
materialSTEEL SINGLE ENDSTEEL SINGLE END
design_formPREBENTPREBENT
seat_radius0.010 INCHES NOMINAL SINGLE END0.010 INCHES NOMINAL SINGLE END IN
thread_class3B SINGLE END3B SINGLE END
wall_thickness0.035 INCHES NOMINAL0.035 INCHES NOMINAL IN
thread_directionRIGHT-HAND SINGLE ENDRIGHT-HAND SINGLE END
mating_end_quantity2 SINGLE END2 SINGLE END
nominal_thread_size0.438 INCHES SINGLE END0.438 INCHES SINGLE END IN
end_connection_styleSWIVEL NUT, FLARED SINGLE ENDSWIVEL NUT, FLARED SINGLE END
tube_outside_diameter0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) SINGLE ENDUNIFIED NATIONAL JOINT FINE (UNJF) SINGLE END
material_document_and_classificationMIL-T-8504 MIL SPEC SINGLE MATERIAL RESPONSE TUBINGMIL-T-8504 MIL SPEC SINGLE MATERIAL RESPONSE TUBING
NSN4710-00-654-6733
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 18355-9 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
DESIGN FORM: PREBENTPREBENT
•
MATING END QUANTITY: 2 SINGLE END2 SINGLE END
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-T-8504 MIL SPEC SINGLE MATERIAL RESPONSE TUBINGMIL-T-8504 MIL SPEC SINGLE MATERIAL RESPONSE TUBING
•
WALL THICKNESS: 0.035 INCHES NOMINAL0.035 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND SINGLE ENDRIGHT-HAND SINGLE END
•
NOMINAL THREAD SIZE: 0.438 INCHES SINGLE END0.438 INCHES SINGLE END IN
•
END CONNECTION STYLE: SWIVEL NUT, FLARED SINGLE ENDSWIVEL NUT, FLARED SINGLE END
•
TUBE OUTSIDE DIAMETER: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DESIGN FORMPREBENTPREBENT
MATING END QUANTITY2 SINGLE END2 SINGLE END
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-T-8504 MIL SPEC SINGLE MATERIAL RESPONSE TUBINGMIL-T-8504 MIL SPEC SINGLE MATERIAL RESPONSE TUBING
WALL THICKNESS0.035 INCHES NOMINAL0.035 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND SINGLE ENDRIGHT-HAND SINGLE END
NOMINAL THREAD SIZE0.438 INCHES SINGLE END0.438 INCHES SINGLE END IN
END CONNECTION STYLESWIVEL NUT, FLARED SINGLE ENDSWIVEL NUT, FLARED SINGLE END
TUBE OUTSIDE DIAMETER0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
SEAT RADIUS0.010 INCHES NOMINAL SINGLE END0.010 INCHES NOMINAL SINGLE END IN
THREAD CLASS3B SINGLE END3B SINGLE END
OTHER ITEMS IN FSC 4710 — Pipe, Tube and Rigid Tubing
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4710-00-001-0080 4710-00-001-0081 4710-00-001-0082 4710-00-001-1229 4710-00-001-1676 4710-00-001-1686 4710-00-001-1688 4710-00-001-1691
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 18355-9?
18355-9 is a TUBE ASSEMBLY,METAL.
What is the NSN for 18355-9?
18355-9 is cataloged in the U.S. Government catalog under NSN 4710-00-654-6733. 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.