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PartsTable / COMPONENT / 4253-66A
4253-66A ✓ 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 CAPACITOR,FIXED,ELECTROLYTIC is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include color: BLACK, phase: THREE SINGLE VOLTAGE, length: 13.000 INCHES NOMINAL IN, diameter: 0.203 INCHES NOMINAL IN, end_type: EXTERNAL THREAD FIRST END, material: STEEL COMP 304 CASE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-253-4415, 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
4253-66A
NSN: 4730-00-253-4415
FSC: 4730
CAGE: 83395 — CONSOLIDATED WELDING AND ENGINEERING CO (USA)
SPECIFICATIONS
colorBLACK
phaseTHREE SINGLE VOLTAGE
length13.000 INCHES NOMINAL IN
diameter0.203 INCHES NOMINAL IN
end_typeEXTERNAL THREAD FIRST END
materialSTEEL COMP 304 CASE
base_typeOCTAL
base_styleMEDIUM SCREW
body_styleSTRAIGHT THRU
body_width1.065 INCHES MAXIMUM IN
bore_shapeSTRAIGHT
bulb_styleA (ARBITRARY DESIGNATION)
NSN4730-00-253-4415
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4253-66A · 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 29
FC2003Interchangeable
interchangeable cross-reference
interchangeable
1025-6Interchangeable
interchangeable cross-reference
interchangeable
11387AInterchangeable
interchangeable cross-reference
interchangeable
SB1861RInterchangeable
interchangeable cross-reference
interchangeable
103S7Interchangeable
interchangeable cross-reference
interchangeable
SM-B-650699-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4253-66A?
4253-66A is a CAPACITOR,FIXED,ELECTROLYTIC.
What parts can replace 4253-66A?
There are 29 known substitutes for 4253-66A: FC2003, 1025-6, 11387A and 26 more. Substitute compatibility should be verified for your specific system.
Is 4253-66A still available?
4253-66A 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