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1655819-6 — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

1655819-6: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL BOSS SECOND END, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END, surface_treatment: CADMIUM OR ZINC OVERALL, nominal_thread_size: 1.062 INCHES SECOND END IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-278-6151, 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
1655819-6
NSN: 4730-00-278-6151
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL BOSS SECOND END
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
surface_treatmentCADMIUM OR ZINC OVERALL
nominal_thread_size1.062 INCHES SECOND END IN
nominal_overall_length1.625 INCHES IN
thread_quantity_per_inch12 SECOND END
thread_series_designatorUNF FIRST END
furnished_items_and_quantity1 PREFORMED PACKING
nominal_outside_diameter_tube_accommodated0.750 INCHES FIRST END IN
NSN4730-00-278-6151
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1655819-6 · 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
•
FURNISHED ITEMS AND QUANTITY: 1 PREFORMED PACKING
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
•
NOMINAL OVERALL LENGTH: 1.625 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.750 INCHES FIRST END IN
•
NOMINAL THREAD SIZE: 1.125 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 PREFORMED PACKING
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
CONNECTION STYLEGASKET SEAL, COMPRESSION (TUBE) FIRST END
NOMINAL OVERALL LENGTH1.625 INCHES IN
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.750 INCHES FIRST END IN
NOMINAL THREAD SIZE1.125 INCHES FIRST END IN
NOMINAL THREAD SIZE1.062 INCHES SECOND END IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
8693960Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 1655819-6?
1655819-6 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace 1655819-6?
There is 1 known substitute for 1655819-6: 8693960. Substitute compatibility should be verified for your specific system.
What is the NSN for 1655819-6?
1655819-6 is cataloged in the U.S. Government catalog under NSN 4730-00-278-6151. 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.