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PartsTable / COMPONENT / J378P03 AND J639P03
J378P03 AND J639P03 ✓ 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 CAP,TUBE is a the manufacturer industrial component. Key specifications include connection_style: PLAIN (OPTIONAL END), style_designator: CAP, TUBE, FLARELESS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-356-8668, 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
J378P03 AND J639P03
NSN: 4730-01-356-8668
FSC: 4730
CAGE: 07482 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
connection_stylePLAIN (OPTIONAL END)
style_designatorCAP, TUBE, FLARELESS
NSN4730-01-356-8668
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: J378P03 AND J639P03 · 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
•
CONNECTION STYLE: PLAIN (OPTIONAL END)
•
STYLE DESIGNATOR: CAP, TUBE, FLARELESS
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEPLAIN (OPTIONAL END)
STYLE DESIGNATORCAP, TUBE, FLARELESS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
17027-10Interchangeable
interchangeable cross-reference
interchangeable
11-850-01Interchangeable
interchangeable cross-reference
interchangeable
2130-10Interchangeable
interchangeable cross-reference
interchangeable
2130-50Interchangeable
interchangeable cross-reference
interchangeable
03-747Interchangeable
interchangeable cross-reference
interchangeable
1986F30Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is J378P03 AND J639P03?
J378P03 AND J639P03 is a CAP,TUBE.
What parts can replace J378P03 AND J639P03?
There are 8 known substitutes for J378P03 AND J639P03: 17027-10, 11-850-01, 2130-10 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for J378P03 AND J639P03?
J378P03 AND J639P03 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-356-8668. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026