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205M4G — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

205M4G: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY BODY, leg_length: 1.281 INCHES NOMINAL IN, seat_angle: 37.0 DEGREES, thread_class: 3A ALL ENDS A, overall_length: 2.833 INCHES MAXIMUM IN, connection_type: EXTERNAL QUICK DISCONNECT ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-233-1698, 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
205M4G
NSN: 4730-01-233-1698
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 79326 — TRANSDIGM INC DIV ADELWIGGINS GROUP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY BODY
leg_length1.281 INCHES NOMINAL IN
seat_angle37.0 DEGREES
thread_class3A ALL ENDS A
overall_length2.833 INCHES MAXIMUM IN
connection_typeEXTERNAL QUICK DISCONNECT ALL ENDS
connection_styleFLARED ALL ENDS
style_designatorMALE COUPLING HALF
surface_treatmentANODIZE BODY
nominal_thread_size0.750 INCHES ALL ENDS IN
quick_disconnect_methodSPRING PUSH-PULL ALL ENDS
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
NSN4730-01-233-1698
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 205M4G · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,GRAY MIL SPEC SINGLE TREATMENT RESPONSE BODY
•
CONNECTION STYLE: FLARED ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
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STYLE DESIGNATOR: MALE COUPLING HALF
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MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE BODY
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.500 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,GRAY MIL SPEC SINGLE TREATMENT RESPONSE BODY
CONNECTION STYLEFLARED ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
CONNECTION TYPEEXTERNAL QUICK DISCONNECT ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE BODY
OVERALL LENGTH2.833 INCHES MAXIMUM IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.500 INCHES ALL ENDS IN
LEG LENGTH1.281 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS 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 205M4G?
205M4G is a COUPLING HALF,QUICK DISCONNECT.
What is the NSN for 205M4G?
205M4G is cataloged in the U.S. Government catalog under NSN 4730-01-233-1698. 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.