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Technical Data Sheet
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6439 ✓ 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

CAPACITOR,FIXED,PAPER DIELECTRIC. Key specifications include material: STEEL COMP 304, thickness: 0.750 INCHES NOMINAL IN, base_style: MINIATURE CAP CONICAL END, bulb_style: T (TUBULAR), construction: SOLID, bore_diameter: 2.0050 INCHES MINIMUM AND 2.0150 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-011-3702, 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
6439
NSN: 4730-00-011-3702
FSC: 4730
CAGE: 78640 — MITSUBISHI CATERPILLAR FORKLIFT AMERICA, INC (USA)
SPECIFICATIONS
materialSTEEL COMP 304
thickness0.750 INCHES NOMINAL IN
base_styleMINIATURE CAP CONICAL END
bulb_styleT (TUBULAR)
constructionSOLID
bore_diameter2.0050 INCHES MINIMUM AND 2.0150 INCHES MAXIMUM IN
overall_length2.125 INCHES NOMINAL IN
voltage_rating12.000 VOLTS NOMINAL
wattage_rating3.000 WATTS
bulb_designatorT-2
outside_diameter2.500 INCHES NOMINAL IN
special_featuresNHA 1740-01-258-3231
NSN4730-00-011-3702
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6439 · 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
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
540010Interchangeable
interchangeable cross-reference
interchangeable
1002-34Interchangeable
interchangeable cross-reference
interchangeable
MS51382-10Interchangeable
interchangeable cross-reference
interchangeable
113702Interchangeable
interchangeable cross-reference
interchangeable
KS10517-7Interchangeable
interchangeable cross-reference
interchangeable
5244-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6439?
6439 is a CAPACITOR,FIXED,PAPER DIELECTRIC.
What parts can replace 6439?
There are 25 known substitutes for 6439: 540010, 1002-34, MS51382-10 and 22 more. Substitute compatibility should be verified for your specific system.
Is 6439 still available?
6439 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