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65356-04001 — CROSS,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

65356-04001: CROSS,TUBE TO BOSS.

The CROSS,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4340 OVERALL, leg_length: 2.175 INCHES NOMINAL FIRST END BULKHEADUNABLE TO DECODE IN, seat_angle: 37.0 DEGREES SECOND END, thread_class: 3A THIRD END A, connection_type: THREADED EXTERNAL TUBE THIRD ENDUNABLE TO DECODE, connection_style: FLARED (TUBE) SECOND END. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-358-8977, 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
65356-04001
NSN: 4730-01-358-8977
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 4340 OVERALL
leg_length2.175 INCHES NOMINAL FIRST END BULKHEADUNABLE TO DECODE IN
seat_angle37.0 DEGREES SECOND END
thread_class3A THIRD END A
connection_typeTHREADED EXTERNAL TUBE THIRD ENDUNABLE TO DECODE
connection_styleFLARED (TUBE) SECOND END
surface_treatmentANODIZE OVERALL
nominal_thread_sizeUNABLE TO DECODE
thread_series_designatorUNABLE TO DECODE
nominal_outside_diameter_tube_accommodatedUNABLE TO DECODE
surface_treatment_document_and_classificationMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN4730-01-358-8977
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 65356-04001 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: UNABLE TO DECODE
•
CONNECTION STYLE: FLARED (TUBE) SECOND END
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST ENDUNABLE TO DECODE
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONUNABLE TO DECODE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
CONNECTION STYLEFLARED (TUBE) SECOND END
CONNECTION STYLEFLARED (TUBE) FIRST END
CONNECTION STYLEFLARED (TUBE) THIRD END
CONNECTION STYLEGASKET SEAL (BOSS) FOURTH END
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST ENDUNABLE TO DECODE
CONNECTION TYPETHREADED EXTERNAL TUBE SECOND ENDUNABLE TO DECODE
CONNECTION TYPETHREADED EXTERNAL TUBE THIRD ENDUNABLE TO DECODE
CONNECTION TYPETHREADED INTERNAL BOSS FOURTH ENDUNABLE TO DECODE
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 65356-04001?
65356-04001 is a CROSS,TUBE TO BOSS.
What is the NSN for 65356-04001?
65356-04001 is cataloged in the U.S. Government catalog under NSN 4730-01-358-8977. 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.