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Technical Data Sheet
PartsTable / COMPONENT / 45X6
45X6 ✓ 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 NUT,TUBE COUPLING,REDUCING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: SPRING END,SQUARED AND GROUND BOTH ENDS, temp_rating: -40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF, bore_diameter: 0.875 INCHES NOMINAL IN, connection_type: THREADED EXTERNAL PIPE FIRST END, inside_diameter: 0.250 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-257-2100, 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
45X6
NSN: 4730-00-257-2100
FSC: 4730
CAGE: 01276 — DANFOSS POWER SOLUTIONS II, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
temp_rating-40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF
bore_diameter0.875 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL PIPE FIRST END
inside_diameter0.250 INCHES NOMINAL IN
connection_stylePLAIN FIRST END
outside_diameter0.562 INCHES NOMINAL IN
style_designatorCYLINDRICAL
thread_directionRIGHT-HAND FIRST END
spring_free_length2.000 INCHES NOMINAL IN
burst_test_pressure5000.0 POUNDS PER SQUARE INCH LBS
NSN4730-00-257-2100
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 45X6 · 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 17
D32Interchangeable
interchangeable cross-reference
interchangeable
2765-18PCF1866Interchangeable
interchangeable cross-reference
interchangeable
346-4801-484681ALT8PCF1866Interchangeable
interchangeable cross-reference
interchangeable
D1GF04-04GFXGF12Interchangeable
interchangeable cross-reference
interchangeable
54232Interchangeable
interchangeable cross-reference
interchangeable
GGG-T-70Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 45X6?
45X6 is a NUT,TUBE COUPLING,REDUCING.
What parts can replace 45X6?
There are 17 known substitutes for 45X6: D32, 2765-18PCF1866, 346-4801-484681ALT8PCF1866 and 14 more. Substitute compatibility should be verified for your specific system.
Is 45X6 still available?
45X6 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