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1655790-4 — TRANSFORMER,AUDIO FREQUENCY

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

1655790-4: TRANSFORMER,AUDIO FREQUENCY.

The TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include material: STEEL OR STEEL COMP 12L14 OVERALL, flow_angle: 90.0 DEGREES, leg_length: 1.438 INCHES NOMINAL SECOND END IN, seat_angle: 30.0 DEGREES FIRST END, thread_class: 2A SECOND END A, connection_type: THREADED EXTERNAL BOSS SECOND END. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-818-8152, 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
1655790-4
NSN: 4730-00-818-8152
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 OR STEEL COMP 12L14 OVERALL
flow_angle90.0 DEGREES
leg_length1.438 INCHES NOMINAL SECOND END IN
seat_angle30.0 DEGREES FIRST END
thread_class2A SECOND END A
connection_typeTHREADED EXTERNAL BOSS SECOND END
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
surface_treatmentOXIDE LOCK NUT
nominal_thread_size0.875 INCHES SECOND END IN
thread_series_designatorNPT FIRST END
furnished_items_and_quantity1 FERRULE SLEEVE AND 1 LOCKNUT AND 1 PLUG AND 1 SHORT COUPLING NUT
NSN4730-00-818-8152
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1655790-4 · 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 FERRULE SLEEVE AND 1 LOCKNUT AND 1 PLUG AND 1 SHORT COUPLING NUT
•
FLOW ANGLE: 90.0 DEGREES
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
•
CONNECTION TYPE: THREADED EXTERNAL BOSS SECOND END
•
LEG LENGTH: 1.468 INCHES NOMINAL FIRST END IN
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 FERRULE SLEEVE AND 1 LOCKNUT AND 1 PLUG AND 1 SHORT COUPLING NUT
FLOW ANGLE90.0 DEGREES
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
CONNECTION STYLEINVERTED FLARE (PIPE) FIRST END
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
LEG LENGTH1.468 INCHES NOMINAL FIRST END IN
LEG LENGTH1.438 INCHES NOMINAL SECOND END IN
NOMINAL THREAD SIZE0.750 INCHES FIRST END IN
NOMINAL THREAD SIZE0.875 INCHES SECOND END IN
SUBSTITUTES & CROSS-REFERENCES 2
2-A400-8Reference document
Same NSN cross-reference
Reference document — Secondary reference
A-400-8Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 1655790-4?
1655790-4 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace 1655790-4?
There are 2 known substitutes for 1655790-4: 2-A400-8, A-400-8. Substitute compatibility should be verified for your specific system.
What is the NSN for 1655790-4?
1655790-4 is cataloged in the U.S. Government catalog under NSN 4730-00-818-8152. This indicates validated use in U.S. government and defense supply chains.
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