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390261-8 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

390261-8: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING BODY, leg_length: 0.657 INCHES NOMINAL IN, overall_length: 2.042 INCHES NOMINAL IN, connection_type: THREADED EXTERNAL TUBE SECOND QUICK DISCONNECT END, connection_style: PUSH (EXTERNAL) FIRST FLUID END CONNECTION, style_designator: MALE COUPLING HALF. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-604-3431, 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
390261-8
NSN: 4730-01-604-3431
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 00624 — EATON AEROQUIP LLC DBA JACKSON NORTH 1 DIV FLUID AND ELECTRICAL DISTRIBUTION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
leg_length0.657 INCHES NOMINAL IN
overall_length2.042 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL TUBE SECOND QUICK DISCONNECT END
connection_stylePUSH (EXTERNAL) FIRST FLUID END CONNECTION
style_designatorMALE COUPLING HALF
surface_treatmentANODIZE OUTSIDE
operating_pressure400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.750 INCHES SECOND QUICK DISCONNECT END IN
nominal_outside_diameter1.250 INCHES IN
thread_quantity_per_inch16 SECOND QUICK DISCONNECT END
thread_series_designatorUNF SECOND QUICK DISCONNECT END
NSN4730-01-604-3431
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 390261-8 · 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 STYLE: FLARED SECOND QUICK DISCONNECT END
•
CONNECTION TYPE: EXTERNAL QUICK DISCONNECT FIRST FLUID END CONNECTION
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
OPERATING PRESSURE: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
LEG LENGTH: 0.657 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARED SECOND QUICK DISCONNECT END
CONNECTION STYLEPUSH (EXTERNAL) FIRST FLUID END CONNECTION
CONNECTION TYPEEXTERNAL QUICK DISCONNECT FIRST FLUID END CONNECTION
CONNECTION TYPETHREADED EXTERNAL TUBE SECOND QUICK DISCONNECT END
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH2.042 INCHES NOMINAL IN
OPERATING PRESSURE400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
LEG LENGTH0.657 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.750 INCHES SECOND QUICK DISCONNECT END IN
NOMINAL OUTSIDE DIAMETER1.250 INCHES IN
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 390261-8?
390261-8 is a COUPLING HALF,QUICK DISCONNECT.
What is the NSN for 390261-8?
390261-8 is cataloged in the U.S. Government catalog under NSN 4730-01-604-3431. 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.