59-1939

Technical Characteristics

• Thread Class

  2a

• Hazardous Locations/Environmental Protection

  explosion proof

• Overall Length

  3.217 inches nominal

• First Flat Length

  0.250 inches nominal

• Overall Diameter

  1.200 inches maximum

• Operating Temp Range

  m55.0/p125.0 deg celsius

• Switch Contact Basic Design

  nonpile-up symmetrical

• Mounting Method

  threaded bushing

• Contact Voltage Rating In Volts

  28.0

• Shaft Flat/Slot Angular Location

  112.5 degrees from nonturn device

• Rotor Through Connection Quantity

  1

• Switch Actuator Indexing Position Quantity

  8

• Contact Load Current Rating

  5.0 amperes resistive load and 2.5 amperes inductive load

• Thread Series Designator

  unef

• Thread Length

  0.187 inches nominal

• Shaft Diameter

  0.248 inches minimum and 0.252 inches maximum

• Shaft Length

  0.790 inches minimum and 0.830 inches maximum

• Individual Section Quantity

  4

• Nonturn Device Type

  slotted bushing

• Pole Quantity

  1

• Throw Quantity

  8

• Nominal Thread Size

  0.375 inches

• Shaft Type

  round,nonparallel flatted

• Terminal Type

  tab,solder lug

• Contact Switching Action

  breaks before makes

• Switch Actuator Positioning Increment

  45.0 degrees

• Precious Material And Location

  contacts silver

• Precious Material

  silver