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1618505 ✓ 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

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING BODY, thread_class: 3B ALL ENDS, overall_length: 3.810 INCHES NOMINAL IN, connection_type: THREADED INTERNAL BOSS FIRST FLUID END CONNECTION, connection_style: BOSS GASKET SEAL ALL ENDS, style_designator: MALE COUPLING HALF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-720-4675, 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
1618505
NSN: 4730-00-720-4675
FSC: 4730
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
thread_class3B ALL ENDS
overall_length3.810 INCHES NOMINAL IN
connection_typeTHREADED INTERNAL BOSS FIRST FLUID END CONNECTION
connection_styleBOSS GASKET SEAL ALL ENDS
style_designatorMALE COUPLING HALF
features_providedSAFETY LOCKING FEATURE AND SELF-SEALING
surface_treatmentPASSIVATE BODY
nominal_thread_size0.562 INCHES ALL ENDS IN
quick_disconnect_methodPUSH-PULL ALL ENDS
thread_series_designatorUNF ALL ENDS
mating_end_identificationNAVAL ORD SYSTEMS COMMAND COUPLING PART NO.1598234
NSN4730-00-720-4675
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1618505 · 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
•
QUICK DISCONNECT METHOD: PUSH-PULL ALL ENDS
•
CONNECTION STYLE: BOSS GASKET SEAL ALL ENDS
•
THREAD CLASS: 3B ALL ENDS
•
CONNECTION TYPE: INTERNAL QUICK DISCONNECT ALL ENDS
•
SURFACE TREATMENT: PASSIVATE BODY
•
THREAD SERIES DESIGNATOR: UNF ALL ENDS
•
FEATURES PROVIDED: SAFETY LOCKING FEATURE AND SELF-SEALING
TECHNICAL CHARACTERISTICS (FLIS)
QUICK DISCONNECT METHODPUSH-PULL ALL ENDS
CONNECTION STYLEBOSS GASKET SEAL ALL ENDS
THREAD CLASS3B ALL ENDS
CONNECTION TYPEINTERNAL QUICK DISCONNECT ALL ENDS
SURFACE TREATMENTPASSIVATE BODY
THREAD SERIES DESIGNATORUNF ALL ENDS
FEATURES PROVIDEDSAFETY LOCKING FEATURE AND SELF-SEALING
CONNECTION TYPETHREADED INTERNAL BOSS FIRST FLUID END CONNECTION
OVERALL LENGTH3.810 INCHES NOMINAL IN
STYLE DESIGNATORMALE COUPLING HALF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
C301Interchangeable
interchangeable cross-reference
interchangeable
323635PC10Interchangeable
interchangeable cross-reference
interchangeable
852758Interchangeable
interchangeable cross-reference
interchangeable
33516Interchangeable
interchangeable cross-reference
interchangeable
7199753Interchangeable
interchangeable cross-reference
interchangeable
CH400Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1618505?
1618505 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 1618505?
There are 12 known substitutes for 1618505: C301, 323635PC10, 852758 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1618505?
1618505 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-720-4675. 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