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128SCH189-5 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

128SCH189-5: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY AND STEEL CORROSION RESISTING BODY, leg_length: 1.120 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN, thread_class: 3A ALL ENDS A, connection_type: INTERNAL QUICK DISCONNECT SECOND QUICK DISCONNECT END, connection_style: SWIVEL NUT, FLARED ALL ENDS, style_designator: MALE COUPLING HALF. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-104-9294, 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
128SCH189-5
NSN: 4730-01-104-9294
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY AND STEEL CORROSION RESISTING BODY
leg_length1.120 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN
thread_class3A ALL ENDS A
connection_typeINTERNAL QUICK DISCONNECT SECOND QUICK DISCONNECT END
connection_styleSWIVEL NUT, FLARED ALL ENDS
style_designatorMALE COUPLING HALF
nominal_thread_size0.438 INCHES ALL ENDS IN
quick_disconnect_methodTWIST-LOCK SECOND QUICK DISCONNECT END
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
nominal_outside_diameter_tube_accommodated0.250 INCHES ALL ENDS IN
NSN4730-01-104-9294
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 128SCH189-5 · 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: SWIVEL NUT, FLARED ALL ENDS
•
CONNECTION TYPE: INTERNAL QUICK DISCONNECT SECOND QUICK DISCONNECT END
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES ALL ENDS IN
•
LEG LENGTH: 1.120 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN
•
NOMINAL THREAD SIZE: 0.438 INCHES ALL ENDS IN
•
THREAD CLASS: 3A ALL ENDS A
TECHNICAL CHARACTERISTICS
CONNECTION STYLESWIVEL NUT, FLARED ALL ENDS
CONNECTION TYPEINTERNAL QUICK DISCONNECT SECOND QUICK DISCONNECT END
CONNECTION TYPETHREADED INTERNAL TUBE FIRST FLUID END CONNECTION
STYLE DESIGNATORMALE COUPLING HALF
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
LEG LENGTH1.120 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
THREAD CLASS3A ALL ENDS A
MATERIALALUMINUM ALLOY AND STEEL CORROSION RESISTING BODY
QUICK DISCONNECT METHODTWIST-LOCK SECOND QUICK DISCONNECT END
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 128SCH189-5?
128SCH189-5 is a COUPLING HALF,QUICK DISCONNECT.
What is the NSN for 128SCH189-5?
128SCH189-5 is cataloged in the U.S. Government catalog under NSN 4730-01-104-9294. This indicates validated use in U.S. government and defense supply chains.
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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.