PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

W42AA1Control,humidity

Johnson Controls Inc Control Products Div · NSN 6685-00-087-5499 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-087-5499 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-087-5499. Primary manufacturer part number: W42AA1.
Features
  • Control,humidity — FSC 6685
  • Mounting Method: BULKHEAD
  • Power Source: EXTERNAL
  • Terminal Type and Quantity: 1 PIN
  • Indication Method: TRANSMITTING DISK SCALE
  • Maximum Overall Height: 1.764 INCHES IN
  • Sensing Element Type: HAIR INTERNAL
  • Material: STEEL CASE
Applications
  • Applications requiring Steel Case construction
General Description

The Control,humidity, cataloged under National Stock Number 6685-00-087-5499, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Johnson Controls Inc Control Products Div. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-00-087-5499
Primary Part NumberW42AA1
Item NameControl,humidity
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerJohnson Controls Inc Control Products Div
StatusCANCELLED
Mounting MethodBULKHEAD
Power SourceEXTERNAL
Terminal Type and Quantity1 PIN
Indication MethodTRANSMITTING DISK SCALE
Maximum Overall Height1.764 INCHES IN
Sensing Element TypeHAIR INTERNAL
MaterialSTEEL CASE
Maximum Overall Length3.937 INCHES IN
Operating Range10 TO 100 PERCENT RELATIVE HUMIDITY RANGE
Surface TreatmentENAMEL CASE
PhaseSINGLE
Frequency in Hertz60.0
Inclosure TypeENCASED
Maximum Voltage Rating in Volts115.0 AC
Terminal LocationBACK
Maximum Overall Width2.062 INCHES IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
2920-00-019-2953UC12 INTERCHANGEABLE
Coil,ignition
Standard Motor Products
3030-00-100-3992B52-2 INTERCHANGEABLE
Belts,v,matched Set
Contitech Usa, Inc Dba Veyance Technologies
5945-00-255-6445A59152 INTERCHANGEABLE
Relay,electromagnetic
Te Connectivity Corporation
5365-00-580-5317NAS43DD0-8FC INTERCHANGEABLE
Spacer,sleeve
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
6105-01-203-0534 INTERCHANGEABLE
Motor,alternating Current
5998-01-485-3307B522 INTERCHANGEABLE
Circuit Card Assembly
Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan
5998-01-486-6088B511 INTERCHANGEABLE
Circuit Card Assembly
Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan
6625-01-511-8739B511 INTERCHANGEABLE
Test Set Subassembly,electrical
Advanced Testing Technologies Inc
6930-01-640-7482B511 INTERCHANGEABLE
Building 511 Equipm
United States Department of Us Army Peo Stri /simulation,training, Instrumentation/
Cross-Reference Index
Part NumberManufacturer
D8492-43A6 Chief of Engineers Dept of Army (USA)
B5-1-1 Ellis & Watts International, Llc (USA)
842-1037 Johnson Controls Inc Control Products Div (USA)
B5-2-2 Ellis & Watts International, Llc (USA)
W42AA1 PRIMARY Johnson Controls Inc Control Products Div (USA)
842-1000 Johnson Controls Inc Control Products Div (USA)
Related Parts
2920-00-019-2953INTERCHANGEABLE
COIL,IGNITION
UC12
3030-00-100-3992INTERCHANGEABLE
BELTS,V,MATCHED SET
B52-2
5945-00-255-6445INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
A59152
5365-00-580-5317INTERCHANGEABLE
SPACER,SLEEVE
NAS43DD0-8FC
6105-01-203-0534INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
5998-01-485-3307INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
B522
5998-01-486-6088INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
B511
6625-01-511-8739INTERCHANGEABLE
TEST SET SUBASSEMBLY,ELECTRICAL
B511
6930-01-640-7482INTERCHANGEABLE
BUILDING 511 EQUIPM
B511

Frequently Asked Questions

What is NSN 6685-00-087-5499?

NSN 6685-00-087-5499 is a Control,humidity, manufactured by Johnson Controls Inc Control Products Div, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-087-5499?

NSN 6685-00-087-5499 has 6 cross-referenced part numbers: D8492-43A6 (Chief of Engineers Dept of Army), B5-1-1 (Ellis & Watts International, Llc), 842-1037 (Johnson Controls Inc Control Products Div), B5-2-2 (Ellis & Watts International, Llc), W42AA1 (Johnson Controls Inc Control Products Div) and 1 more.

What NSN replaces 6685-00-087-5499?

There are 9 known substitutes for 6685-00-087-5499: 2920-00-019-2953, 3030-00-100-3992, 5945-00-255-6445 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of W42AA1?

Key specifications for W42AA1: Mounting Method: BULKHEAD; Power Source: EXTERNAL; Terminal Type and Quantity: 1 PIN; Indication Method: TRANSMITTING DISK SCALE. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-087-5499 still in active supply?

NSN 6685-00-087-5499 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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