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Technical Data Sheet
PartsTable / COMPONENT / B53
B53 ✓ 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 material: RUBBER SYNTHETIC OVERALL, tip_type: FLAT TIP, tip_width: 0.250 INCHES NOMINAL IN, wheel_style: TEARDROP, usage_design: METALWORKING, nominal_width: 0.656 INCHES IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-024-9490, 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
B53
NSN: 4730-00-024-9490
FSC: 4730
CAGE: 97111 — PARKER-HANNIFIN CORPORATION DIV QUICK COUPLING DIVISION (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
tip_typeFLAT TIP
tip_width0.250 INCHES NOMINAL IN
wheel_styleTEARDROP
usage_designMETALWORKING
belt_quantity2
nominal_width0.656 INCHES IN
overall_width3.625 INCHES NOMINAL IN
physical_formCRYSTAL
terminal_typeSCREW
fiber_materialSYNTHETIC OVERALL
overall_height1.750 INCHES NOMINAL IN
NSN4730-00-024-9490
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: B53 · 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 27
DPR410-4Interchangeable
interchangeable cross-reference
interchangeable
W140-4Interchangeable
interchangeable cross-reference
interchangeable
993340-4Interchangeable
interchangeable cross-reference
interchangeable
12030Interchangeable
interchangeable cross-reference
interchangeable
416-0582Interchangeable
interchangeable cross-reference
interchangeable
0-33259Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B53?
B53 is a CAPACITOR,FIXED,ELECTROLYTIC.
What parts can replace B53?
There are 27 known substitutes for B53: DPR410-4, W140-4, 993340-4 and 24 more. Substitute compatibility should be verified for your specific system.
Is B53 still available?
B53 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