PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12C3-2BCore Assembly,fluid Heater,indus

Ellis & Watts International, Llc · NSN 4420-00-003-2812 · FSC 4420 · No Item Name Available
Verified by PartsTable
NSN 4420-00-003-2812 — this item is cataloged by the U.S. Government under National Stock Number 4420-00-003-2812. Primary manufacturer part number: 12C3-2B.
Features
  • Core Assembly,fluid Heater,indus — FSC 4420
  • Core Width: 3.750 INCHES NOMINAL IN
  • Style Designator: FINNED "S" TUBE
  • Core Length: 19.125 INCHES NOMINAL IN
  • Material: COPPER ALLOY CA122 TUBES
  • Heat Transfer Method: INDIRECT
  • Core Height: 24.876 INCHES NOMINAL IN
  • 1 verified cross-reference
Applications
  • Applications requiring Copper Alloy CA122 Tubes construction
General Description

The Core Assembly,fluid Heater,indus, cataloged under National Stock Number 4420-00-003-2812, is classified within Federal Supply Class 4420 (No Item Name Available) of the Furnace, Steam, Drying, Nuclear Reactors group. The primary manufacturer of record is Ellis & Watts International, Llc. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4420-00-003-2812
Primary Part Number12C3-2B
Item NameCore Assembly,fluid Heater,indus
FSC / FSG4420 / 44 — No Item Name Available
ManufacturerEllis & Watts International, Llc
StatusACTIVE
Core Width3.750 INCHES NOMINAL IN
Style DesignatorFINNED "S" TUBE
Core Length19.125 INCHES NOMINAL IN
MaterialCOPPER ALLOY CA122 TUBES
Heat Transfer MethodINDIRECT
Core Height24.876 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Cross-Reference Index
Part NumberManufacturer
12C3-2B PRIMARY Ellis & Watts International, Llc (USA)
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Frequently Asked Questions

What is NSN 4420-00-003-2812?

NSN 4420-00-003-2812 is a Core Assembly,fluid Heater,indus, manufactured by Ellis & Watts International, Llc, classified under FSC 4420 (No Item Name Available). Status: active.

What are the part numbers for NSN 4420-00-003-2812?

NSN 4420-00-003-2812 has 1 cross-referenced part number: 12C3-2B (Ellis & Watts International, Llc).

What are the specifications of 12C3-2B?

Key specifications for 12C3-2B: Core Width: 3.750 INCHES NOMINAL IN; Style Designator: FINNED "S" TUBE; Core Length: 19.125 INCHES NOMINAL IN; Material: COPPER ALLOY CA122 TUBES. 6 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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