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418423-1 — COUPLING,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

418423-1: COUPLING,TUBE.

The COUPLING,TUBE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 3B FIRST END, nominal_thread_size: 1.000 INCHES FIRST END IN, nominal_overall_length: 4.250 INCHES IN, thread_quantity_per_inch: 12 FIRST END, thread_series_designator: UNS FIRST END. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-357-9311, 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
418423-1
NSN: 4730-00-357-9311
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 80020 — NAVAL AIR WARFARE CENTER AIRCRAFT DIVISION JOINT BASE JBMDL (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class3B FIRST END
nominal_thread_size1.000 INCHES FIRST END IN
nominal_overall_length4.250 INCHES IN
thread_quantity_per_inch12 FIRST END
thread_series_designatorUNS FIRST END
NSN4730-00-357-9311
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 418423-1 · 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
•
NOMINAL OVERALL LENGTH: 4.250 INCHES IN
•
NOMINAL THREAD SIZE: 1.000 INCHES FIRST END IN
•
THREAD CLASS: 3B FIRST END
•
THREAD QUANTITY PER INCH: 12 FIRST END
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES DESIGNATOR: UNS FIRST END
TECHNICAL CHARACTERISTICS
NOMINAL OVERALL LENGTH4.250 INCHES IN
NOMINAL THREAD SIZE1.000 INCHES FIRST END IN
THREAD CLASS3B FIRST END
THREAD QUANTITY PER INCH12 FIRST END
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNS FIRST END
SUBSTITUTES & CROSS-REFERENCES 1
425255-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 418423-1?
418423-1 is a COUPLING,TUBE.
What parts can replace 418423-1?
There is 1 known substitute for 418423-1: 425255-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 418423-1?
418423-1 is cataloged in the U.S. Government catalog under NSN 4730-00-357-9311. 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.