PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5-594Hygrothermograph

Belfort Instrument Company · NSN 6685-01-022-8470 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-022-8470 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-022-8470. Primary manufacturer part number: 5-594.
Features
  • Hygrothermograph — FSC 6685
  • 1 verified cross-reference
  • Primary manufacturer: Belfort Instrument Company
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Hygrothermograph, cataloged under National Stock Number 6685-01-022-8470, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Belfort Instrument Company. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-01-022-8470
Primary Part Number5-594
Item NameHygrothermograph
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerBelfort Instrument Company
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5905-00-175-5594589022-3 INTERCHANGEABLE
Resistor,variable,wire Wound,pre
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5960-00-262-0284 INTERCHANGEABLE
Electron Tube
4820-01-052-2738300221 INTERCHANGEABLE
Cover,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
5310-01-080-8998100002 INTERCHANGEABLE
Nut
Star Cases Llc Dba Zero Manufacturing
5340-01-177-5329300122 INTERCHANGEABLE
Cover,access
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
5-594 PRIMARY Belfort Instrument Company (USA)
Related Parts
5905-00-175-5594INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,PRE
589022-3
5960-00-262-0284INTERCHANGEABLE
ELECTRON TUBE
4820-01-052-2738INTERCHANGEABLE
COVER,VALVE
300221
5310-01-080-8998INTERCHANGEABLE
NUT
100002
5340-01-177-5329INTERCHANGEABLE
COVER,ACCESS
300122

Frequently Asked Questions

What is NSN 6685-01-022-8470?

NSN 6685-01-022-8470 is a Hygrothermograph, manufactured by Belfort Instrument Company, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-01-022-8470?

NSN 6685-01-022-8470 has 1 cross-referenced part number: 5-594 (Belfort Instrument Company).

What NSN replaces 6685-01-022-8470?

There are 5 known substitutes for 6685-01-022-8470: 5905-00-175-5594, 5960-00-262-0284, 4820-01-052-2738 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5-594?

Key specifications for 5-594: Special Features: FURNISHED ITEMS:PEN,INK,CHARTS,INSTRUCTION BOOK;OPERATING RANGE:MINUS 20 DEG TO 110 DEG F TEMP,20 PCT TO 95 PCT HUMIDITY;SENSING ELEMENT TYPE:BOURDON TUBE TEMP AND HUMAN HAIR HUMIDITY;O/A L 13.000 IN.,O/A H 9.000 IN.,O/A W 6.000 IN. IN. 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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