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EC255J6 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

EC255J6: 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: 0.571 INCHES MINIMUM AND 0.581 INCHES MAXIMUM IN, seat_angle: 12.0 DEGREES, thread_class: 3A ALL ENDS A, overall_length: 1.695 INCHES MINIMUM AND 1.799 INCHES MAXIMUM IN, connection_type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-160-5793, 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
EC255J6
NSN: 4730-01-160-5793
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 79326 — TRANSDIGM INC DIV ADELWIGGINS GROUP (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
leg_length0.571 INCHES MINIMUM AND 0.581 INCHES MAXIMUM IN
seat_angle12.0 DEGREES
thread_class3A ALL ENDS A
overall_length1.695 INCHES MINIMUM AND 1.799 INCHES MAXIMUM IN
connection_typeTHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
connection_styleFLARELESS ALL ENDS
style_designatorMALE COUPLING HALF
surface_treatmentPASSIVATE BODY
nominal_thread_size0.562 INCHES ALL ENDS IN
quick_disconnect_methodSPRING PUSH-PULL ALL ENDS
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
NSN4730-01-160-5793
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: EC255J6 · 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: FLARELESS ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.375 INCHES ALL ENDS IN
•
QUICK DISCONNECT NOMINAL SIZE: 0.578 INCHES ALL ENDS IN
•
LEG LENGTH: 0.571 INCHES MINIMUM AND 0.581 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARELESS ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
CONNECTION TYPEEXTERNAL QUICK DISCONNECT ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH1.695 INCHES MINIMUM AND 1.799 INCHES MAXIMUM IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES ALL ENDS IN
QUICK DISCONNECT NOMINAL SIZE0.578 INCHES ALL ENDS IN
LEG LENGTH0.571 INCHES MINIMUM AND 0.581 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.562 INCHES ALL ENDS IN
SEAT ANGLE12.0 DEGREES
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 3
4730PL1321780Reference document
Same NSN cross-reference
Reference document — Informative reference only
LEC255J6Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5189376-002Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 EC255J6?
EC255J6 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace EC255J6?
There are 3 known substitutes for EC255J6: 4730PL1321780, LEC255J6, 5189376-002. Substitute compatibility should be verified for your specific system.
What is the NSN for EC255J6?
EC255J6 is cataloged in the U.S. Government catalog under NSN 4730-01-160-5793. 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.