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7030-78-240-4104 — COUPLING,BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

7030-78-240-4104: COUPLING,BOSS.

The COUPLING,BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, thread_class: 3B ALL ENDS, connection_type: THREADED INTERNAL BOSS ALL ENDS, connection_style: GASKET SEAL (BOSS) ALL ENDS, special_features: EXT THD ONE END 1.625-12 UNJ-3A A, style_designator: RIGID, SHORT CENTER WRENCHING FACILITY. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-339-6748, 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
7030-78-240-4104
NSN: 4730-01-339-6748
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
thread_class3B ALL ENDS
connection_typeTHREADED INTERNAL BOSS ALL ENDS
connection_styleGASKET SEAL (BOSS) ALL ENDS
special_featuresEXT THD ONE END 1.625-12 UNJ-3A A
style_designatorRIGID, SHORT CENTER WRENCHING FACILITY
nominal_thread_size1.062 INCHES ALL ENDS IN
nominal_overall_length2.570 INCHES IN
thread_quantity_per_inch12 ALL ENDS
thread_series_designatorUNIFIED NATIONAL JOINT (UNJ) ALL ENDS
material_document_and_classificationQQ-A-225/9 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-A-200/11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4730-01-339-6748
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 7030-78-240-4104 · 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
•
CONNECTION STYLE: GASKET SEAL (BOSS) ALL ENDS
•
NOMINAL OVERALL LENGTH: 2.570 INCHES IN
•
CONNECTION TYPE: THREADED INTERNAL BOSS ALL ENDS
•
STYLE DESIGNATOR: RIGID, SHORT CENTER WRENCHING FACILITY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/9 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-A-200/11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 1.062 INCHES ALL ENDS IN
•
THREAD CLASS: 3B ALL ENDS
TECHNICAL CHARACTERISTICS
CONNECTION STYLEGASKET SEAL (BOSS) ALL ENDS
NOMINAL OVERALL LENGTH2.570 INCHES IN
CONNECTION TYPETHREADED INTERNAL BOSS ALL ENDS
STYLE DESIGNATORRIGID, SHORT CENTER WRENCHING FACILITY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/9 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-A-200/11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE1.062 INCHES ALL ENDS IN
SPECIAL FEATURESEXT THD ONE END 1.625-12 UNJ-3A A
THREAD CLASS3B ALL ENDS
THREAD QUANTITY PER INCH12 ALL ENDS
MATERIALALUMINUM ALLOY 6061 OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
70307-82404Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7030-78-240-4104?
7030-78-240-4104 is a COUPLING,BOSS.
What parts can replace 7030-78-240-4104?
There is 1 known substitute for 7030-78-240-4104: 70307-82404. Substitute compatibility should be verified for your specific system.
What is the NSN for 7030-78-240-4104?
7030-78-240-4104 is cataloged in the U.S. Government catalog under NSN 4730-01-339-6748. 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.