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6728015-4 — NUT,TUBE COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

6728015-4: NUT,TUBE COUPLING.

The NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: TUBE COUPLING, nut_height: 0.719 INCHES NOMINAL IN, thread_class: 3A A, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-317-8223, 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
6728015-4
NSN: 4730-01-317-8223
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 63005 — ROLLS-ROYCE CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleTUBE COUPLING
nut_height0.719 INCHES NOMINAL IN
thread_class3A A
thread_seriesUNF
thread_directionRIGHT-HAND
length_to_shoulder0.600 INCHES NOMINAL IN
width_across_flats0.684 INCHES MINIMUM AND 0.691 INCHES MAXIMUM IN
nominal_thread_size0.437 INCHES IN
smallest_inside_diameter0.441 INCHES NOMINAL IN
thread_quantity_per_inch20
nominal_tube_outside_diameter0.250 INCHES IN
NSN4730-01-317-8223
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6728015-4 · 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
•
LENGTH TO SHOULDER: 0.600 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.684 INCHES MINIMUM AND 0.691 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.437 INCHES IN
•
NUT HEIGHT: 0.719 INCHES NOMINAL IN
•
NUT STYLE: TUBE COUPLING
•
THREAD CLASS: 3A A
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER0.600 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.684 INCHES MINIMUM AND 0.691 INCHES MAXIMUM IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.437 INCHES IN
NUT HEIGHT0.719 INCHES NOMINAL IN
NUT STYLETUBE COUPLING
THREAD CLASS3A A
THREAD QUANTITY PER INCH20
MATERIALSTEEL 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 6728015-4?
6728015-4 is a NUT,TUBE COUPLING.
What is the NSN for 6728015-4?
6728015-4 is cataloged in the U.S. Government catalog under NSN 4730-01-317-8223. 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.