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7D0261C56 — NUT ASSEMBLY,TUBE COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

7D0261C56: NUT ASSEMBLY,TUBE COUPLING.

The NUT ASSEMBLY,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304, thread_size: 4-1/4-16, thread_class: 2B, overall_length: 0.920 INCHES NOMINAL IN, outside_diameter: 4.590 INCHES NOMINAL IN, style_designator: NUT ASSEMBLY. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-384-9008, 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
7D0261C56
NSN: 4730-01-384-9008
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 88277 — THE BOEING COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 304
thread_size4-1/4-16
thread_class2B
overall_length0.920 INCHES NOMINAL IN
outside_diameter4.590 INCHES NOMINAL IN
style_designatorNUT ASSEMBLY
thread_directionRIGHT-HAND
screw_thread_series_designatorUN
tube_outside_diameter_for_which_designed3.500 INCHES NOMINAL IN
NSN4730-01-384-9008
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 7D0261C56 · 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
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 3.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NUT ASSEMBLY
•
OUTSIDE DIAMETER: 4.590 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SIZE: 4-1/4-16
•
SCREW THREAD SERIES DESIGNATOR: UN
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED3.500 INCHES NOMINAL IN
STYLE DESIGNATORNUT ASSEMBLY
OVERALL LENGTH0.920 INCHES NOMINAL IN
OUTSIDE DIAMETER4.590 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD SIZE4-1/4-16
SCREW THREAD SERIES DESIGNATORUN
THREAD CLASS2B
MATERIALSTEEL COMP 304
SUBSTITUTES & CROSS-REFERENCES 2
7D0261Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
NA30135CReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 7D0261C56?
7D0261C56 is a NUT ASSEMBLY,TUBE COUPLING.
What parts can replace 7D0261C56?
There are 2 known substitutes for 7D0261C56: 7D0261, NA30135C. Substitute compatibility should be verified for your specific system.
What is the NSN for 7D0261C56?
7D0261C56 is cataloged in the U.S. Government catalog under NSN 4730-01-384-9008. 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.