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65A81C312-02 — NUT,TUBE COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

65A81C312-02: NUT,TUBE COUPLING.

The NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: TUBE COUPLING, nut_height: 0.210 INCHES NOMINAL0.210 INCHES NOMINAL IN, thread_class: 2A2A, thread_series: UNFUNF, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-491-3101, 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
65A81C312-02
NSN: 4730-00-491-3101
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 79343 — ASRC FEDERAL FACILITIES LOGISTICS, LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleTUBE COUPLING
nut_height0.210 INCHES NOMINAL0.210 INCHES NOMINAL IN
thread_class2A2A
thread_seriesUNFUNF
thread_directionRIGHT-HAND
fabrication_methodMACHINED
width_across_flats0.441 INCHES NOMINAL0.441 INCHES NOMINAL IN
nominal_thread_size0.375 INCHES0.375 INCHES IN
end_item_identification45N AIRCRAFT, PROWLER EA-6B45N AIRCRAFT, PROWLER EA-6B
smallest_inside_diameter0.255 INCHES NOMINAL IN
thread_quantity_per_inch24
NSN4730-00-491-3101
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 65A81C312-02 · 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
•
WIDTH ACROSS FLATS: 0.441 INCHES NOMINAL0.441 INCHES NOMINAL IN
•
THREAD SERIES: UNFUNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES0.375 INCHES IN
•
NUT HEIGHT: 0.210 INCHES NOMINAL0.210 INCHES NOMINAL IN
•
NUT STYLE: TUBE COUPLING
•
THREAD CLASS: 2A2A
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.441 INCHES NOMINAL0.441 INCHES NOMINAL IN
THREAD SERIESUNFUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES0.375 INCHES IN
NUT HEIGHT0.210 INCHES NOMINAL0.210 INCHES NOMINAL IN
NUT STYLETUBE COUPLING
THREAD CLASS2A2A
END ITEM IDENTIFICATION45N AIRCRAFT, PROWLER EA-6B45N AIRCRAFT, PROWLER EA-6B
THREAD QUANTITY PER INCH24
MATERIALCOPPER ALLOY OVERALL
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 65A81C312-02?
65A81C312-02 is a NUT,TUBE COUPLING.
What is the NSN for 65A81C312-02?
65A81C312-02 is cataloged in the U.S. Government catalog under NSN 4730-00-491-3101. 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.