PartsTable TECHNICAL DATA SHEET
AUGUST 2026Technical Data Sheet

4-400500Heater,duct Type,portable

Hdt Expeditionary Systems Inc · NSN 4520-01-136-2139 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-01-136-2139 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-136-2139. Primary manufacturer part number: 4-400500.
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 4520-01-136-2139, 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4520-01-136-2139
Primary Part Number4-400500
Item NameHeater,duct Type,portable
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerHdt Expeditionary Systems Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4730-01-327-85764400500 INTERCHANGEABLE
Strainer Element,sediment
W S Darley & Co
7105-01-652-8445FX702-01 INTERCHANGEABLE
Cabinet,bedside
Nemschoff, Inc.
Cross-Reference Index
Part NumberManufacturer
4-400500 PRIMARY Hdt Expeditionary Systems Inc (USA)
Related Parts
4730-01-327-8576INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
4400500
7105-01-652-8445INTERCHANGEABLE
CABINET,BEDSIDE
FX702-01

Frequently Asked Questions

What is NSN 4520-01-136-2139?

NSN 4520-01-136-2139 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 4520-01-136-2139?

NSN 4520-01-136-2139 has 1 cross-referenced part number: 4-400500 (Hdt Expeditionary Systems Inc).

What NSN replaces 4520-01-136-2139?

There are 2 known substitutes for 4520-01-136-2139: 4730-01-327-8576, 7105-01-652-8445. Verify interchangeability with system specifications before substitution.

What are the specifications of 4-400500?

Key specifications for 4-400500: End Item Identification: LINE OF COMMUNICATION AND BASE SUPPORT HEATING SYSTEMS AND OTHER 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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