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Technical Data Sheet
PartsTable / COMPONENT / EMS-4666
EMS-4666 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

COUPLING ASSEMBLY,QUICK DISCONNE. Key specifications include phase: SINGLE, shape: CYLINDRICAL, material: MICA OVERALL, nut_style: SLEEVE, sterility: STERILE, bore_shape: STRAIGHT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-557-7610, 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
EMS-4666
NSN: 4730-00-557-7610
FSC: 4730
CAGE: 86831 — SAFRAN ELECTRONICS & DEFENSE, AVIONICS USA, LLC DBA USE CAGE CODE 879B2 FOR CATALOGING (USA)
SPECIFICATIONS
phaseSINGLE
shapeCYLINDRICAL
materialMICA OVERALL
nut_styleSLEEVE
sterilitySTERILE
bore_shapeSTRAIGHT
nut_length0.687 INCHES NOMINAL IN
current_typeAC
nut_diameter0.730 INCHES MINIMUM AND 0.740 INCHES MAXIMUM IN
thread_class2B
body_diameter5.000 INCHES NOMINAL IN
bore_diameter0.1875 INCHES NOMINAL IN
NSN4730-00-557-7610
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: EMS-4666 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
CC11710Interchangeable
interchangeable cross-reference
interchangeable
4666RInterchangeable
interchangeable cross-reference
interchangeable
2D2936Interchangeable
interchangeable cross-reference
interchangeable
3246FXInterchangeable
interchangeable cross-reference
interchangeable
121207Interchangeable
interchangeable cross-reference
interchangeable
A733S-49CFBInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is EMS-4666?
EMS-4666 is a COUPLING ASSEMBLY,QUICK DISCONNE.
What parts can replace EMS-4666?
There are 20 known substitutes for EMS-4666: CC11710, 4666R, 2D2936 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for EMS-4666?
EMS-4666 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-557-7610. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026