PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

41000Heater,duct Type,portable

Hdt Expeditionary Systems Inc · NSN 4520-01-559-8737 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-01-559-8737 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-559-8737. Primary manufacturer part number: 41000.
Features
  • Heater,duct Type,portable — FSC 4520
  • 1 verified cross-reference
  • Primary manufacturer: Hdt Expeditionary Systems Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heater,duct Type,portable, cataloged under National Stock Number 4520-01-559-8737, 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 Hdt Expeditionary Systems Inc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4520-01-559-8737
Primary Part Number41000
Item NameHeater,duct Type,portable
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerHdt Expeditionary Systems Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5835-00-060-98895CA INTERCHANGEABLE
Recorder,sound
Dictaphone Corporation
2540-00-262-8325752507 INTERCHANGEABLE
Wedge,door Dovetail
Stewart-Warner Corporation
5975-00-296-9941 INTERCHANGEABLE
Nut,coupling,electrical Conduit
2915-00-590-987241000-1 INTERCHANGEABLE
Valve,check,fuel
Essex Industries Inc Div Manufacturing Division
5950-00-594-832725885 INTERCHANGEABLE
Coil,radio Frequency
Raytheon Company Dba Raytheon
2825-00-716-889441000 INTERCHANGEABLE
Eye,regulating Valv
Northrop Grumman Systems Corporation Div Marine Systems
5995-00-740-728741000 INTERCHANGEABLE
Cable Assembly
Unison Industries Llc
5950-00-762-728241000 INTERCHANGEABLE
Coil,radio Frequency
Arizona Capacitors, Inc
5998-01-053-418191-041000 INTERCHANGEABLE
Circuit Card Assembly
Charles Industries, Llc Div Telecom
4820-01-127-8203 INTERCHANGEABLE
Valve,stop-Check
Cross-Reference Index
Part NumberManufacturer
41000 PRIMARY Hdt Expeditionary Systems Inc (USA)
Related Parts
5835-00-060-9889INTERCHANGEABLE
RECORDER,SOUND
5CA
2540-00-262-8325INTERCHANGEABLE
WEDGE,DOOR DOVETAIL
752507
5975-00-296-9941INTERCHANGEABLE
NUT,COUPLING,ELECTRICAL CONDUIT
2915-00-590-9872INTERCHANGEABLE
VALVE,CHECK,FUEL
41000-1
5950-00-594-8327INTERCHANGEABLE
COIL,RADIO FREQUENCY
25885
2825-00-716-8894INTERCHANGEABLE
EYE,REGULATING VALV
41000
5995-00-740-7287INTERCHANGEABLE
CABLE ASSEMBLY
41000
5950-00-762-7282INTERCHANGEABLE
COIL,RADIO FREQUENCY
41000
5998-01-053-4181INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
91-041000
4820-01-127-8203INTERCHANGEABLE
VALVE,STOP-CHECK
1710-01-592-0151INTERCHANGEABLE
WEBBING ASSEMBLY,BARRIER AIRCRAF

Frequently Asked Questions

What is NSN 4520-01-559-8737?

NSN 4520-01-559-8737 is a Heater,duct Type,portable, manufactured by Hdt Expeditionary Systems Inc, classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-01-559-8737?

NSN 4520-01-559-8737 has 1 cross-referenced part number: 41000 (Hdt Expeditionary Systems Inc).

What NSN replaces 4520-01-559-8737?

There are 11 known substitutes for 4520-01-559-8737: 5835-00-060-9889, 2540-00-262-8325, 5975-00-296-9941 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 41000?

Key specifications for 41000: End Item Identification: HEATING SYSTEM AND RELATED EQUIPMENT. 1 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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