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KU00004128 — COUPLING,CONTROL

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

KU00004128: COUPLING,CONTROL.

The COUPLING,CONTROL is a the manufacturer industrial component. Key specifications include material: PLASTIC LENS, thread_class: 2A A, thread_series: UNEF, overall_length: 0.631 INCHES MINIMUM AND 0.681 INCHES MAXIMUM IN, furnished_items: O-RING, mounting_method: EXTERNAL THREAD. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-508-0208, 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
KU00004128
NSN: 4730-01-508-0208
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 06853 — BENDIX COMMERCIAL VEHICLE SYSTEMS LLC DBA BENDIX COMMERCIAL VEHICLE SYSTEMS (USA)
SPECIFICATIONS
materialPLASTIC LENS
thread_class2A A
thread_seriesUNEF
overall_length0.631 INCHES MINIMUM AND 0.681 INCHES MAXIMUM IN
furnished_itemsO-RING
mounting_methodEXTERNAL THREAD
thread_diameter0.312 INCHES IN
thread_quantity32 PER INCH
effective_length0.422 INCHES MINIMUM AND 0.452 INCHES MAXIMUM IN
style_designatorSTOVEPIPE
thread_directionRIGHT-HAND
surface_conditionSMOOTH FACE
NSN4730-01-508-0208
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: KU00004128 · 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
SUBSTITUTES & CROSS-REFERENCES 1
3389276Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is KU00004128?
KU00004128 is a COUPLING,CONTROL.
What parts can replace KU00004128?
There is 1 known substitute for KU00004128: 3389276. Substitute compatibility should be verified for your specific system.
What is the NSN for KU00004128?
KU00004128 is cataloged in the U.S. Government catalog under NSN 4730-01-508-0208. 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.