Model: 21558-4

Thermostatic Switch

Properties:

Thread Length
0.760 inches single threaded bushing
Hazardous Locations/environmental Protection
Weatherproof
Overall Length
2.750 inches
Body Diameter
0.610 inches
Body Length
1.010 inches
Tempurature Sensing Element Type
Internal sensor
Width Across Flats
Between 0.875 inches and 0.940 inches
Mounting Method
Threaded bushing
Thready Qty Per Inch (tpi)
14 single threaded bushing
Contact Action Stimulus
Increase
Thread Size
0.500 inches single threaded bushing
Nonpile-up Contact Arrangement
1 pole, single throw, normally open, momentary action
Terminal Type
Connector, receptacle
Contact Load Current Rating
6.0 amperes resistive load first voltage and 1.0 amperes inductive load first voltage and 1.0 amperes lamp load first voltage
Contact Load Current Rating
6.0 amperes resistive load second voltage and 1.0 amperes inductive load second voltage and 1.0 amperes lamp load second voltage
Contact Adjustability
Deactuation point not adjustable and actuation point not adjustable
Contact Stimulus Rating
285.00 actuation point degrees fahrenheit and 280.00 deactuation point degrees fahrenheit
Contact Voltage Rating In Volts
115.0 ac at sea level first voltage
Contact Voltage Rating In Volts
28.0 dc at sea level second voltage
Media For Which Designed
Liquid
Style Designator
Cylindrical w/flange
Test Data Document
81349-mil-s-12285 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Thread Series Designator
Nptf single threaded bushing
Specification Data
81349-mil-s-12285/2 government specification
NSN
5930-00-224-7218
Part Number
21558-4
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 21558-4 NSN 5930-00-224-7218

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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
4.0 X 2.0 X 2.0
Paclk Weight:
0.2000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061300
UFC:
34410
LTL:
77.5
LCL:
--
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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