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PartsTable / COMPONENT / PLH666J001 FN 18
PLH666J001 FN 18 ✓ 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 TAILPIECE,UNION is a the manufacturer industrial component. Key specifications include body_width: 1.125 INCHES NOMINAL IN, body_height: 2.375 INCHES NOMINAL IN, body_length: 1.937 INCHES NOMINAL IN, inclosure_type: HERMETICALLY SEALED, overall_height: 0.750 INCHES NOMINAL IN, mounting_method: THREADED HOLE(S) SINGLE GROUP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-557-0137, 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
PLH666J001 FN 18
NSN: 4730-01-557-0137
FSC: 4730
CAGE: 98523 — JERED LLC (USA)
SPECIFICATIONS
body_width1.125 INCHES NOMINAL IN
body_height2.375 INCHES NOMINAL IN
body_length1.937 INCHES NOMINAL IN
inclosure_typeHERMETICALLY SEALED
overall_height0.750 INCHES NOMINAL IN
mounting_methodTHREADED HOLE(S) SINGLE GROUP
frequency_rating800.0 HERTZ NOMINAL SINGLE COMPONENT
nominal_thread_size0.112 INCHES SINGLE GROUP IN
reliability_indicatorNOT ESTABLISHED
thread_quantity_per_inch40 SINGLE GROUP
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
winding_operating_voltage225.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
NSN4730-01-557-0137
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: PLH666J001 FN 18 · 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 5
145-7Interchangeable
interchangeable cross-reference
interchangeable
1450-0008Interchangeable
interchangeable cross-reference
interchangeable
548-7028-003Interchangeable
interchangeable cross-reference
interchangeable
42713Interchangeable
interchangeable cross-reference
interchangeable
136001Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PLH666J001 FN 18?
PLH666J001 FN 18 is a TAILPIECE,UNION.
What parts can replace PLH666J001 FN 18?
There are 5 known substitutes for PLH666J001 FN 18: 145-7, 1450-0008, 548-7028-003 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PLH666J001 FN 18?
PLH666J001 FN 18 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-557-0137. 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