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4WBU-MCP — NIPPLE,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4WBU-MCP: NIPPLE,TUBE.

The NIPPLE,TUBE is a the manufacturer industrial component. Key specifications include criticality_code_justification: ZZZY, part_name_assigned_by_controlling_agency: AUTOMATED ELECTROLYTIC OXUGEN GENERATOR, reference_number_differentiating_characteristics: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-478-3612, 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
4WBU-MCP
NSN: 4730-01-478-3612
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81412 — TREADWELL CORPORATION (DELAWARE) DBA TREADWELL CORP (USA)
SPECIFICATIONS
criticality_code_justificationZZZY
part_name_assigned_by_controlling_agencyAUTOMATED ELECTROLYTIC OXUGEN GENERATOR
reference_number_differentiating_characteristicsCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
NSN4730-01-478-3612
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4WBU-MCP · 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 3
21-19826 FIND 27Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4WBU-MReference document
Same NSN cross-reference
Reference document — Design control — primary reference
21-19826Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4WBU-MCP?
4WBU-MCP is a NIPPLE,TUBE.
What parts can replace 4WBU-MCP?
There are 3 known substitutes for 4WBU-MCP: 21-19826 FIND 27, 4WBU-M, 21-19826. Substitute compatibility should be verified for your specific system.
What is the NSN for 4WBU-MCP?
4WBU-MCP is cataloged in the U.S. Government catalog under NSN 4730-01-478-3612. 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.