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6405-20-4-O — ADAPTER,STRAIGHT,PIPE TO HOSE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

6405-20-4-O: ADAPTER,STRAIGHT,PIPE TO HOSE.

The ADAPTER,STRAIGHT,PIPE TO HOSE is a the manufacturer industrial component. Key specifications include thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL FIRST END, end_item_identification: LIGHT ARMORED VEHICLES, thread_quantity_per_inch: 12 FIRST END, thread_series_designator: UN AND UNF FIRST END, part_name_assigned_by_controlling_agency: ADAPTER. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-677-0978, 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
6405-20-4-O
NSN: 4730-01-677-0978
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 22031 — AIR-WAY MANUFACTURING COMPANY (USA)
SPECIFICATIONS
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL FIRST END
end_item_identificationLIGHT ARMORED VEHICLES
thread_quantity_per_inch12 FIRST END
thread_series_designatorUN AND UNF FIRST END
part_name_assigned_by_controlling_agencyADAPTER
NSN4730-01-677-0978
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6405-20-4-O · 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
•
CONNECTION TYPE: THREADED EXTERNAL FIRST END
•
THREAD CLASS: 2A FIRST END A
•
THREAD QUANTITY PER INCH: 12 FIRST END
•
THREAD SERIES DESIGNATOR: NPTF SECOND END
TECHNICAL CHARACTERISTICS
CONNECTION TYPETHREADED EXTERNAL FIRST END
CONNECTION TYPETHREADED INTERNAL PIPE SECOND END
PART NAME ASSIGNED BY CONTROLLING AGENCYADAPTER
THREAD CLASS2A FIRST END A
END ITEM IDENTIFICATIONLIGHT ARMORED VEHICLES
THREAD QUANTITY PER INCH12 FIRST END
THREAD QUANTITY PER INCH18 SECOND END
THREAD SERIES DESIGNATORNPTF SECOND END
THREAD SERIES DESIGNATORUN AND UNF FIRST END
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6405-20-4-O?
6405-20-4-O is a ADAPTER,STRAIGHT,PIPE TO HOSE.
What is the NSN for 6405-20-4-O?
6405-20-4-O is cataloged in the U.S. Government catalog under NSN 4730-01-677-0978. 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.