Model: 21490-4

Thermostatic Switch
Description:

2a single threaded bushing thread class, 0.875 inches single threaded bushing thread length, 2.783 inches overall length, 0.660 inches body diameter.

Properties:

Thread Class
2a single threaded bushing
Thread Length
0.875 inches single threaded bushing
Overall Length
2.783 inches
Body Diameter
0.660 inches
Body Length
2.529 inches
Width Across Flats
Between 0.173 inches and 0.203 inches
Operating Tempurature Rating
Between -40.0 degrees fahrenheit and 185.0 degrees fahrenheit
Mounting Method
Threaded bushing
Thready Qty Per Inch (tpi)
14 single threaded bushing
Contact Action Stimulus
Increase
Thread Size
0.875 inches single threaded bushing
Nonpile-up Contact Arrangement
1 pole, single throw, normally open, momentary action
Terminal Type
Connector, receptacle
Contact Load Current Rating
2.5 amperes resistive load first voltage
Contact Load Current Rating
5.0 amperes resistive load second voltage
Contact Load Current Rating
6.5 amperes resistive load third voltage
Contact Adjustability
Deactuation point adjustable, preset and actuation point adjustable, preset
Contact Voltage Rating In Volts
125.0 ac at sea level second voltage
Contact Voltage Rating In Volts
250.0 ac at sea level first voltage
Contact Voltage Rating In Volts
30.0 dc at sea level third voltage
Thread Series Designator
Unf single threaded bushing
NSN
5930-00-055-9229
Part Number
21490-4
Description
Switch,thermostatic
CAGE
82647

A switch that is actuated by changes in ambient temperature. Excludes circuit breaker; control, temperature (as modified); fuse (as modified); protector, thermal-overload, electrical motor; relay, thermal; and thermostat, flow control. See also control, temperature (as modified) and regulator, temperature (as modified).

Part 21490-4 NSN 5930-00-055-9229

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00451
FIIG:
A048B0
Concept No.:
1
App. Key:
F
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061300
UFC:
34410
LTL:
77.5
LCL:
77.5
WCC:
658
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 9032100000
  • SITC: 87461
  • End Use: Measuring, testing, control instruments
  • NAICS: 334512
  • USDA: 1

Freight Class: Thermostats

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