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1781390 — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

1781390: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 12L14 OVERALL, flow_angle: 90.0 DEGREES, leg_length: 1.844 INCHES NOMINAL SECOND END IN, thread_class: 2A ALL ENDS A, connection_type: THREADED EXTERNAL BOSS SECOND END, connection_style: GASKET SEAL (TUBE) FIRST END. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-283-8194, 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
1781390
NSN: 4730-01-283-8194
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 45152 — OSHKOSH CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 12L14 OVERALL
flow_angle90.0 DEGREES
leg_length1.844 INCHES NOMINAL SECOND END IN
thread_class2A ALL ENDS A
connection_typeTHREADED EXTERNAL BOSS SECOND END
connection_styleGASKET SEAL (TUBE) FIRST END
surface_treatmentCHROMATE OVERALL
operating_pressure6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size1.188 INCHES FIRST END IN
thread_quantity_per_inch12 FIRST END
thread_series_designatorUN FIRST END
nondefinitive_spec/std_data9 FIGURE
NSN4730-01-283-8194
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1781390 · 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
•
FLOW ANGLE: 90.0 DEGREES
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.750 INCHES FIRST END IN
•
OPERATING PRESSURE: 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 PREFORMED PACKING
FLOW ANGLE90.0 DEGREES
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
CONNECTION STYLEGASKET SEAL (TUBE) FIRST END
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.750 INCHES FIRST END IN
OPERATING PRESSURE6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
LEG LENGTH1.469 INCHES NOMINAL FIRST END IN
LEG LENGTH1.844 INCHES NOMINAL SECOND END IN
SUBSTITUTES & CROSS-REFERENCES 7
J1453-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
J1453-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
J1453Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE-J1453/3Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
12-8C5OLO-SReference document
Same NSN cross-reference
Reference document — Secondary reference
SAE J1453-3 12-8 520220CAReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedAcquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1781390?
1781390 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace 1781390?
There are 7 known substitutes for 1781390: J1453-1, J1453-3, J1453 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1781390?
1781390 is cataloged in the U.S. Government catalog under NSN 4730-01-283-8194. This indicates validated use in U.S. government and defense supply chains.
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