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1QM21G4S56A — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

1QM21G4S56A: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include special_features: DUST CAP SHALL BE RETAINED;FLARE FITTING PER MS33656E5 ON 1ST END WITH MALE QUICK DISCONNECT ON 2ND END, end_item_identification: C17 17N2N0265-547 OXYGEN SYSTEM, part_name_assigned_by_controlling_agency: DISCONNECT,QUICK,HALO-OUTLET,OXYGEN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-466-4769, 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
1QM21G4S56A
NSN: 4730-01-466-4769
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 24984 — HYDRAFLOW (USA)
SPECIFICATIONS
special_featuresDUST CAP SHALL BE RETAINED;FLARE FITTING PER MS33656E5 ON 1ST END WITH MALE QUICK DISCONNECT ON 2ND END
end_item_identificationC17 17N2N0265-547 OXYGEN SYSTEM
part_name_assigned_by_controlling_agencyDISCONNECT,QUICK,HALO-OUTLET,OXYGEN
NSN4730-01-466-4769
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1QM21G4S56A · 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESDUST CAP SHALL BE RETAINED;FLARE FITTING PER MS33656E5 ON 1ST END WITH MALE QUICK DISCONNECT ON 2ND END
PART NAME ASSIGNED BY CONTROLLING AGENCYDISCONNECT,QUICK,HALO-OUTLET,OXYGEN
END ITEM IDENTIFICATIONC17 17N2N0265-547 OXYGEN SYSTEM
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 2
4819-002-01Reference document
Same NSN cross-reference
Reference document — Secondary reference
17B2N8003-511Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1QM21G4S56A?
1QM21G4S56A is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 1QM21G4S56A?
There are 2 known substitutes for 1QM21G4S56A: 4819-002-01, 17B2N8003-511. Substitute compatibility should be verified for your specific system.
What is the NSN for 1QM21G4S56A?
1QM21G4S56A is cataloged in the U.S. Government catalog under NSN 4730-01-466-4769. 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.