PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILH22663Heater,space,electric

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4520-00-240-8314 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-00-240-8314 — this item is cataloged by the U.S. Government under National Stock Number 4520-00-240-8314. Primary manufacturer part number: MILH22663.
Features
  • Heater,space,electric — FSC 4520
  • Voltage in Volts: 115.0
  • Inclosure Material: STEEL CORROSION RESISTING
  • Heating Element Type: ELECTRIC NONIMMERSION
  • Current Type: AC
  • Operating Control Type: HAND SWITCH
  • Heat Discharge Outlet Type: STATIONARY
  • Width: 22.000 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heater,space,electric, cataloged under National Stock Number 4520-00-240-8314, is classified within Federal Supply Class 4520 (No Item Name Available) of the Plumbing, Heating, and Waste Disposal group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4520-00-240-8314
Primary Part NumberMILH22663
Item NameHeater,space,electric
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Voltage in Volts115.0
Inclosure MaterialSTEEL CORROSION RESISTING
Heating Element TypeELECTRIC NONIMMERSION
Current TypeAC
Operating Control TypeHAND SWITCH
Heat Discharge Outlet TypeSTATIONARY
Width22.000 INCHES NOMINAL IN
Depth6.000 INCHES NOMINAL IN
Heat Directing DeviceFIXED LOUVER
Heat Outlet Quantity1
Frequency in Hertz60.0
Height7.000 INCHES NOMINAL IN
Heat Delivery Rate3415.0 BRITISH THERMAL UNIT
Heat Delivery DirectionHORIZONTAL
PhaseSINGLE
Nondefinitive Spec/std DataT-NM TYPE
Mounting TypeFLOOR-WALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
4520-00-036-5932G123-21TYPET INTERCHANGEABLE
Heater,space,electric
Valad Electric Heating Corp.
4520-00-036-5934252-X21P18948-4 INTERCHANGEABLE
Heater,space,electric
Indeeco Llc Dba Indeeco
5996-00-224-6175 INTERCHANGEABLE
Amplifier,audio Frequency
4520-00-240-8311 INTERCHANGEABLE
Heater,space,electric
4520-00-240-8312 INTERCHANGEABLE
Heater,space,electric
4520-00-240-8313 INTERCHANGEABLE
Heater,space,electric
4520-01-153-9294275565 INTERCHANGEABLE
Heater,space,electric
Chromalox Inc Dba Chromalox Precision Heat and Control, Inc
4520-01-189-2101BH42.0-3-NM INTERCHANGEABLE
Heater,space,electric
Valad Electric Heating Corp.
4520-01-326-1396 INTERCHANGEABLE
Heater,space,electric
Cross-Reference Index
Part NumberManufacturer
MILH22663 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
G395442-1 Raytheon Company Div Corp (USA)
252-X21A18948-3 Indeeco Llc Dba Indeeco (USA)
Related Parts
4520-00-036-5932INTERCHANGEABLE
HEATER,SPACE,ELECTRIC
G123-21TYPET
4520-00-036-5934INTERCHANGEABLE
HEATER,SPACE,ELECTRIC
252-X21P18948-4
5996-00-224-6175INTERCHANGEABLE
AMPLIFIER,AUDIO FREQUENCY
4520-00-240-8311INTERCHANGEABLE
HEATER,SPACE,ELECTRIC
4520-00-240-8312INTERCHANGEABLE
HEATER,SPACE,ELECTRIC
4520-00-240-8313INTERCHANGEABLE
HEATER,SPACE,ELECTRIC
4520-01-153-9294INTERCHANGEABLE
HEATER,SPACE,ELECTRIC
275565
4520-01-189-2101INTERCHANGEABLE
HEATER,SPACE,ELECTRIC
BH42.0-3-NM
4520-01-326-1396INTERCHANGEABLE
HEATER,SPACE,ELECTRIC

Frequently Asked Questions

What is NSN 4520-00-240-8314?

NSN 4520-00-240-8314 is a Heater,space,electric, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-00-240-8314?

NSN 4520-00-240-8314 has 3 cross-referenced part numbers: MILH22663 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), G395442-1 (Raytheon Company Div Corp), 252-X21A18948-3 (Indeeco Llc Dba Indeeco).

What NSN replaces 4520-00-240-8314?

There are 9 known substitutes for 4520-00-240-8314: 4520-00-036-5932, 4520-00-036-5934, 5996-00-224-6175 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILH22663?

Key specifications for MILH22663: Voltage in Volts: 115.0; Inclosure Material: STEEL CORROSION RESISTING; Heating Element Type: ELECTRIC NONIMMERSION; Current Type: AC. 17 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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