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Technical Data Sheet
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51449-03 — PLUG,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

51449-03: PLUG,QUICK DISCONNECT.

The PLUG,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include operating_pressure: 30.00 BAR MAXIMUM, quick_disconnect_method: PUSH-PULL, part_name_assigned_by_controlling_agency: COUPLER, QUICK DISCONNECT. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-561-0577, 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
51449-03
NSN: 4730-01-561-0577
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 21392 — TRANSDIGM INC DIV ADELWIGGINS GROUP (USA)
SPECIFICATIONS
special_featuresFEMALE COUPLER SIDE, MALE SIDE PART NUMBER 51448 FOR NIPPLE. METRIC SIZE. WORKING; HFC2455FA. THREAD MJ10 X 4H 6H. WORKING PRESSURE 20 BAR. PROOF 30 BAR
operating_pressure30.00 BAR MAXIMUM
quick_disconnect_methodPUSH-PULL
part_name_assigned_by_controlling_agencyCOUPLER, QUICK DISCONNECT
NSN4730-01-561-0577
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 51449-03 · 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
•
OPERATING PRESSURE: 30.00 BAR MAXIMUM
•
QUICK DISCONNECT METHOD: PUSH-PULL
TECHNICAL CHARACTERISTICS
OPERATING PRESSURE30.00 BAR MAXIMUM
SPECIAL FEATURESFEMALE COUPLER SIDE, MALE SIDE PART NUMBER 51448 FOR NIPPLE. METRIC SIZE. WORKING; HFC2455FA. THREAD MJ10 X 4H 6H. WORKING PRESSURE 20 BAR. PROOF 30 BAR
PART NAME ASSIGNED BY CONTROLLING AGENCYCOUPLER, QUICK DISCONNECT
QUICK DISCONNECT METHODPUSH-PULL
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 51449-03?
51449-03 is a PLUG,QUICK DISCONNECT.
What is the NSN for 51449-03?
51449-03 is cataloged in the U.S. Government catalog under NSN 4730-01-561-0577. 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.