1-1957-2B4

Technical Characteristics

• Thread Length

  0.430 inches nominal

• Flat Height

  0.205 inches minimum and 0.215 inches maximum

• Shaft Length

  0.370 inches nominal

• Throw Quantity

  4

• Mounting Method

  threaded bushing

• Nominal Thread Size

  0.375 inches

• Shaft Type

  round,flatted

• Switch Actuator Stop Device Type

  fixed stop

• Contact Load Current Rating

  2.0 amperes inductive load and 3.0 amperes resistive load

• Contact Load Current Rating

  5.0 amperes resistive load

• Thread Series Designator

  unef

• Thread Class

  2a

• Hazardous Locations/Environmental Protection

  explosion proof

• Overall Length

  2.360 inches nominal

• First Flat Length

  0.250 inches nominal

• Shaft Diameter

  0.250 inches nominal

• Overall Diameter

  1.150 inches nominal

• Nonturn Device Radius

  0.432 inches nominal

• Individual Section Quantity

  2

• Nonturn Device Type

  tab

• Operating Temp Range

  m65.0/p85.0 deg celsius

• Switch Contact Basic Design

  nonpile-up symmetrical

• Pole Quantity

  1

• Contact Voltage Rating In Volts

  115.0

• Contact Voltage Rating In Volts

  28.0

• Rotor Through Connection Quantity

  1

• Switch Actuator Indexing Position Quantity

  4

• Terminal Type

  tab,solder lug

• Contact Switching Action

  breaks before makes

• Switch Actuator Positioning Increment

  60.0 degrees

• Precious Material And Location

  contacts silver

• Precious Material

  silver

• Style Designator

  tap,circular,bushing mount