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Technical Data Sheet
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W8003 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The BREATHING TUBE,RESPIRATOR is a the manufacturer industrial component. Key specifications include criticality_code_justification: TEXT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-266-3899, 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
W8003
NSN: 4730-00-266-3899
FSC: 4730
CAGE: 41947 — MUELLER BRASS CO. (USA)
SPECIFICATIONS
criticality_code_justificationTEXT
NSN4730-00-266-3899
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: W8003 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 32
31-026-1020Interchangeable
interchangeable cross-reference
interchangeable
1250-0053Interchangeable
interchangeable cross-reference
interchangeable
366-6Interchangeable
interchangeable cross-reference
interchangeable
A11202Interchangeable
interchangeable cross-reference
interchangeable
21965Interchangeable
interchangeable cross-reference
interchangeable
11202Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is W8003?
W8003 is a BREATHING TUBE,RESPIRATOR.
What parts can replace W8003?
There are 32 known substitutes for W8003: 31-026-1020, 1250-0053, 366-6 and 29 more. Substitute compatibility should be verified for your specific system.
Is W8003 still available?
W8003 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026