PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ASP-4Probe-Air Sensor

Valad Electric Heating Corp. · NSN 4520-01-341-8735 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-01-341-8735 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-341-8735. Primary manufacturer part number: ASP-4.
Features
  • Probe-Air Sensor — FSC 4520
  • General Characteristics Item Description: UNIT SENSES MOVING AIR AND CONTROLS A SWITCH
  • 1 verified cross-reference
  • Primary manufacturer: Valad Electric Heating Corp.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Probe-Air Sensor, cataloged under National Stock Number 4520-01-341-8735, 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 Valad Electric Heating Corp.. Government technical data includes 1 verified specification, 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4520-01-341-8735
Primary Part NumberASP-4
Item NameProbe-Air Sensor
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerValad Electric Heating Corp.
StatusACTIVE
General Characteristics Item DescriptionUNIT SENSES MOVING AIR AND CONTROLS A SWITCH
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5340-00-582-7717ASP-4 INTERCHANGEABLE
Plug,protective,dust and Moistur
Parker Hannifin Corporation Div Hydraulic Systems Division
5340-00-817-0912NAS818-4 INTERCHANGEABLE
Plug,protective,dust and Moistur
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
2990-01-531-4626ASP-4 INTERCHANGEABLE
Muffler,exhaust
Arrow Pneumatics Inc
Cross-Reference Index
Part NumberManufacturer
ASP-4 PRIMARY Valad Electric Heating Corp. (USA)
Related Parts
5340-00-582-7717INTERCHANGEABLE
PLUG,PROTECTIVE,DUST AND MOISTUR
ASP-4
5340-00-817-0912INTERCHANGEABLE
PLUG,PROTECTIVE,DUST AND MOISTUR
NAS818-4
2990-01-531-4626INTERCHANGEABLE
MUFFLER,EXHAUST
ASP-4

Frequently Asked Questions

What is NSN 4520-01-341-8735?

NSN 4520-01-341-8735 is a Probe-Air Sensor, manufactured by Valad Electric Heating Corp., classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-01-341-8735?

NSN 4520-01-341-8735 has 1 cross-referenced part number: ASP-4 (Valad Electric Heating Corp.).

What NSN replaces 4520-01-341-8735?

There are 3 known substitutes for 4520-01-341-8735: 5340-00-582-7717, 5340-00-817-0912, 2990-01-531-4626. Verify interchangeability with system specifications before substitution.

What are the specifications of ASP-4?

Key specifications for ASP-4: General Characteristics Item Description: UNIT SENSES MOVING AIR AND CONTROLS A SWITCH. 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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