PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

252-X21P18948-4Heater,space,electric

Indeeco Llc Dba Indeeco · NSN 4520-00-036-5934 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-00-036-5934 — this item is cataloged by the U.S. Government under National Stock Number 4520-00-036-5934. Primary manufacturer part number: 252-X21P18948-4.
Features
  • Heater,space,electric — FSC 4520
  • Mounting Type: FLOOR-WALL
  • Current Rating in Amps: 2.5
  • Heat Directing Device: FIXED LOUVER
  • Nondefinitive Spec/std Data: T TYPE
  • Surface Treatment: ENAMEL
  • Inclosure Material: STEEL
  • Voltage in Volts: 440.0
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heater,space,electric, cataloged under National Stock Number 4520-00-036-5934, 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 Indeeco Llc Dba Indeeco. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 6 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
NSN4520-00-036-5934
Primary Part Number252-X21P18948-4
Item NameHeater,space,electric
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerIndeeco Llc Dba Indeeco
StatusACTIVE
Mounting TypeFLOOR-WALL
Current Rating in Amps2.5
Heat Directing DeviceFIXED LOUVER
Nondefinitive Spec/std DataT TYPE
Surface TreatmentENAMEL
Inclosure MaterialSTEEL
Voltage in Volts440.0
Outlet Position90 DEG APART
Current TypeAC
Heating Element TypeELECTRIC NONIMMERSION
Width22.000 INCHES NOMINAL IN
Heat Discharge Outlet TypeSTATIONARY
Frequency in Hertz60.0
Depth6.000 INCHES NOMINAL IN
Heat Outlet Quantity4
PhaseSINGLE
Heat Delivery Rate3412.0 BRITISH THERMAL UNIT
Heat Delivery DirectionHORIZONTAL AND VERTICAL
Operating Control TypeTHERMOSTATIC
Height7.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
4520-00-036-5932G123-21TYPET INTERCHANGEABLE
Heater,space,electric
Valad Electric Heating Corp.
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
4520-00-240-8314 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
MIL-H22663T-NM1000WT440UL60CY-AC Marine Electric Systems Inc (USA)
MIL-H22663T-NM1 000WT440VL60CY- Zf Industrieantriebe Witten Gmbh (DEU)
TNM42-1FO Valad Electric Heating Corp. (USA)
3010180 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
MILH22663 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
G123-20TYPET Marine Electric Systems Inc (USA)
MIL-H22663T-NM1 000WT440UL60CY- Zf Industrieantriebe Witten Gmbh (DEU)
MIL-H22663T-NM1000WT440VL60CY-AC Indeeco Llc Dba Indeeco (USA)
MIL-H22663T-NM1000WT440VL60CY-AC Valad Electric Heating Corp. (USA)
252-X21P18948-4 PRIMARY Indeeco Llc Dba Indeeco (USA)
79-1332 Valad Electric Heating Corp. (USA)
Related Parts
4520-00-036-5932INTERCHANGEABLE
HEATER,SPACE,ELECTRIC
G123-21TYPET
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
4520-00-240-8314INTERCHANGEABLE
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 4520-00-036-5934?

NSN 4520-00-036-5934 is a Heater,space,electric, manufactured by Indeeco Llc Dba Indeeco, classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-00-036-5934?

NSN 4520-00-036-5934 has 11 cross-referenced part numbers: MIL-H22663T-NM1000WT440UL60CY-AC (Marine Electric Systems Inc), MIL-H22663T-NM1 000WT440VL60CY- (Zf Industrieantriebe Witten Gmbh), TNM42-1FO (Valad Electric Heating Corp.), 3010180 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), MILH22663 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 6 more.

What NSN replaces 4520-00-036-5934?

There are 9 known substitutes for 4520-00-036-5934: 4520-00-036-5932, 5996-00-224-6175, 4520-00-240-8311 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 252-X21P18948-4?

Key specifications for 252-X21P18948-4: Mounting Type: FLOOR-WALL; Current Rating in Amps: 2.5; Heat Directing Device: FIXED LOUVER; Nondefinitive Spec/std Data: T TYPE. 20 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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