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5118-3-4 4X3 — REDUCER,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

5118-3-4 4X3: REDUCER,PIPE.

The REDUCER,PIPE is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 4730-01-239-8398, 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
5118-3-4 4X3
NSN: 4730-01-239-8398
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 12168 — NIBCO INC (USA)
SPECIFICATIONS
Part Number5118-3-4 4X3
NSN4730-01-239-8398
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 5118-3-4 4X3 · 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
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 4
05050078Reference document
Same NSN cross-reference
Reference document — Secondary reference
4589K103Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
059427Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
839-422CReference document
Same NSN cross-reference
Reference document — Secondary reference
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 5118-3-4 4X3?
5118-3-4 4X3 is a REDUCER,PIPE.
What parts can replace 5118-3-4 4X3?
There are 4 known substitutes for 5118-3-4 4X3: 05050078, 4589K103, 059427 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5118-3-4 4X3?
5118-3-4 4X3 is cataloged in the U.S. Government catalog under NSN 4730-01-239-8398. 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.