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7031-02-390-0101 — COUPLING,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

7031-02-390-0101: COUPLING,TUBE.

The COUPLING,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, seat_angle: 37.0 DEGREES ALL ENDS, thread_class: 3B ALL ENDS, connection_type: THREADED INTERNAL TUBE ALL ENDS, connection_style: SWIVEL NUT INVERTED FLARE (TUBE) ALL ENDS, style_designator: SWIVEL, WRENCHING FACILITIES EACH END. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-169-1948, 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
7031-02-390-0101
NSN: 4730-01-169-1948
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
seat_angle37.0 DEGREES ALL ENDS
thread_class3B ALL ENDS
connection_typeTHREADED INTERNAL TUBE ALL ENDS
connection_styleSWIVEL NUT INVERTED FLARE (TUBE) ALL ENDS
style_designatorSWIVEL, WRENCHING FACILITIES EACH END
surface_treatmentANODIZE OVERALL
nominal_thread_size1.312 INCHES ALL ENDS IN
nominal_overall_length2.412 INCHES IN
end_item_identificationAIRFRAME
thread_quantity_per_inch12 ALL ENDS
thread_series_designatorUNIFIED NATIONAL JOINT (UNJ) ALL ENDS
NSN4730-01-169-1948
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 7031-02-390-0101 · 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
•
CONNECTION STYLE: SWIVEL NUT INVERTED FLARE (TUBE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 2.412 INCHES IN
•
CONNECTION TYPE: THREADED INTERNAL TUBE ALL ENDS
•
STYLE DESIGNATOR: SWIVEL, WRENCHING FACILITIES EACH END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 1.000 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 1.312 INCHES ALL ENDS IN
•
SEAT ANGLE: 37.0 DEGREES ALL ENDS
•
SURFACE TREATMENT: ANODIZE OVERALL
TECHNICAL CHARACTERISTICS
CONNECTION STYLESWIVEL NUT INVERTED FLARE (TUBE) ALL ENDS
NOMINAL OVERALL LENGTH2.412 INCHES IN
CONNECTION TYPETHREADED INTERNAL TUBE ALL ENDS
STYLE DESIGNATORSWIVEL, WRENCHING FACILITIES EACH END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.000 INCHES ALL ENDS IN
NOMINAL THREAD SIZE1.312 INCHES ALL ENDS IN
SEAT ANGLE37.0 DEGREES ALL ENDS
SURFACE TREATMENTANODIZE OVERALL
THREAD CLASS3B ALL ENDS
END ITEM IDENTIFICATIONAIRFRAME
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
70310-23900Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7031-02-390-0101?
7031-02-390-0101 is a COUPLING,TUBE.
What parts can replace 7031-02-390-0101?
There is 1 known substitute for 7031-02-390-0101: 70310-23900. Substitute compatibility should be verified for your specific system.
What is the NSN for 7031-02-390-0101?
7031-02-390-0101 is cataloged in the U.S. Government catalog under NSN 4730-01-169-1948. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.