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140-25-12D — NUT,TUBE COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

140-25-12D: NUT,TUBE COUPLING.

The NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2017 OVERALL, nut_style: TUBE COUPLING, nut_height: 0.912 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-433-3226, 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
140-25-12D
NSN: 4730-00-433-3226
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 00624 — EATON AEROQUIP LLC DBA JACKSON NORTH 1 DIV FLUID AND ELECTRICAL DISTRIBUTION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2017 OVERALL
nut_styleTUBE COUPLING
nut_height0.912 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
thread_class3B
thread_seriesUN
thread_directionRIGHT-HAND
surface_treatmentANODIZE OVERALL
fabrication_methodMACHINED
width_across_flats1.750 INCHES NOMINAL IN
nominal_thread_size1.625 INCHES IN
smallest_inside_diameter1.380 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN
thread_quantity_per_inch12
NSN4730-00-433-3226
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 140-25-12D · 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: 1.750 INCHES NOMINAL IN
•
THREAD SERIES: UN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/5,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.625 INCHES IN
•
NUT HEIGHT: 0.912 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
NUT STYLE: TUBE COUPLING
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.750 INCHES NOMINAL IN
THREAD SERIESUN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/5,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.625 INCHES IN
NUT HEIGHT0.912 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
NUT STYLETUBE COUPLING
THREAD CLASS3B
THREAD QUANTITY PER INCH12
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 2
140-25-12Reference document
Same NSN cross-reference
Reference document — Secondary reference
AN6224-12Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 140-25-12D?
140-25-12D is a NUT,TUBE COUPLING.
What parts can replace 140-25-12D?
There are 2 known substitutes for 140-25-12D: 140-25-12, AN6224-12. Substitute compatibility should be verified for your specific system.
What is the NSN for 140-25-12D?
140-25-12D is cataloged in the U.S. Government catalog under NSN 4730-00-433-3226. 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.