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40A-4IN — COUPLING,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

40A-4IN: COUPLING,PIPE.

The COUPLING,PIPE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, style_designator: GROOVED AND THREADED EXTERNAL, surface_treatment: ANODIZE OVERALL, nominal_thread_size: 4.000 INCHES FIRST END IN, nominal_overall_length: 6.000 INCHES IN, thread_series_designator: NPT FIRST END. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-178-0296, 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
40A-4IN
NSN: 4730-01-178-0296
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 79154 — VICTAULIC COMPANY OF AMERICA INC DBA VICTAULIC COMPANY OF AMERICA (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
style_designatorGROOVED AND THREADED EXTERNAL
surface_treatmentANODIZE OVERALL
nominal_thread_size4.000 INCHES FIRST END IN
nominal_overall_length6.000 INCHES IN
thread_series_designatorNPT FIRST END
nominal_pipe_size_accommodated4.000 INCHES SECOND END IN
material_document_and_classificationWW-T-700/6,COND T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-A-8625,TYPE 2,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
pipe_wall_thickness_designation_for_which_designedSCHEDULE 40 SECOND END
NSN4730-01-178-0296
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 40A-4IN · 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
•
NOMINAL PIPE SIZE ACCOMMODATED: 4.000 INCHES SECOND END IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TYPE 2,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
NOMINAL OVERALL LENGTH: 6.000 INCHES IN
•
STYLE DESIGNATOR: GROOVED AND THREADED EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: WW-T-700/6,COND T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 4.000 INCHES FIRST END IN
•
PIPE WALL THICKNESS DESIGNATION FOR WHICH DESIGNED: SCHEDULE 40 SECOND END
•
SURFACE TREATMENT: ANODIZE OVERALL
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE ACCOMMODATED4.000 INCHES SECOND END IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 2,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NOMINAL OVERALL LENGTH6.000 INCHES IN
STYLE DESIGNATORGROOVED AND THREADED EXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONWW-T-700/6,COND T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE4.000 INCHES FIRST END IN
PIPE WALL THICKNESS DESIGNATION FOR WHICH DESIGNEDSCHEDULE 40 SECOND END
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY 6061 OVERALL
THREAD SERIES DESIGNATORNPT FIRST END
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 4
M10388-A-07-AI-1-C-6AReference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-P-10388Reference document
Same NSN cross-reference
Reference document — Secondary reference
A-A-52592Reference document
Same NSN cross-reference
Reference document — Identification reference
AA52592-A07AI1C6ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 40A-4IN?
40A-4IN is a COUPLING,PIPE.
What parts can replace 40A-4IN?
There are 4 known substitutes for 40A-4IN: M10388-A-07-AI-1-C-6A, MIL-P-10388, A-A-52592 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40A-4IN?
40A-4IN is cataloged in the U.S. Government catalog under NSN 4730-01-178-0296. 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.