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Technical Data Sheet
PartsTable / COMPONENT / 2666J5
2666J5 ✓ 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 CONNECTOR,PLUG,ELECTRICAL is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: SLIP JOINT NUT, thread_series: NPT, furnished_items: SLIP JOINT WASHER AND FRICTION RING, thread_direction: RIGHT-HAND, surface_treatment: CHROMIUM OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-270-3890, 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
2666J5
NSN: 4730-00-270-3890
FSC: 4730
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleSLIP JOINT NUT
thread_seriesNPT
furnished_itemsSLIP JOINT WASHER AND FRICTION RING
thread_directionRIGHT-HAND
surface_treatmentCHROMIUM OVERALL
nominal_thread_size1.250 INCHES IN
thread_quantity_per_inch11-1/2
nondefinitive_spec/std_data6 FIGURE
nominal_pipe_size_designation1.250 INCHES IN
nominal_tube_outside_diameter1.250 INCHES IN
NSN4730-00-270-3890
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2666J5 · 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
•
THREAD SERIES: NPT
•
THREAD DIRECTION: RIGHT-HAND
•
FURNISHED ITEMS: SLIP JOINT WASHER AND FRICTION RING
•
THREAD QUANTITY PER INCH: 11-1/2
•
NOMINAL TUBE OUTSIDE DIAMETER: 1.250 INCHES IN
•
NOMINAL THREAD SIZE: 1.250 INCHES IN
•
NUT STYLE: SLIP JOINT NUT
•
NONDEFINITIVE SPEC/STD DATA: 6 FIGURE
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESNPT
THREAD DIRECTIONRIGHT-HAND
FURNISHED ITEMSSLIP JOINT WASHER AND FRICTION RING
THREAD QUANTITY PER INCH11-1/2
NOMINAL TUBE OUTSIDE DIAMETER1.250 INCHES IN
NOMINAL THREAD SIZE1.250 INCHES IN
NUT STYLESLIP JOINT NUT
NONDEFINITIVE SPEC/STD DATA6 FIGURE
NOMINAL PIPE SIZE DESIGNATION1.250 INCHES IN
SURFACE TREATMENTCHROMIUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
FFB187TYPE751Interchangeable
interchangeable cross-reference
interchangeable
8633Interchangeable
interchangeable cross-reference
interchangeable
14139-14274Interchangeable
interchangeable cross-reference
interchangeable
320602Interchangeable
interchangeable cross-reference
interchangeable
SEEPIDInterchangeable
interchangeable cross-reference
interchangeable
B16.23Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2666J5?
2666J5 is a CONNECTOR,PLUG,ELECTRICAL.
What parts can replace 2666J5?
There are 19 known substitutes for 2666J5: FFB187TYPE751, 8633, 14139-14274 and 16 more. Substitute compatibility should be verified for your specific system.
Is 2666J5 still available?
2666J5 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026