58-1939

Technical Characteristics

• First Flat Length

  0.240 inches minimum single actuator and 0.260 inches maximum

• Thread Class

  2a single mounting facility

• Flat Height

  0.209 inches minimum single actuator and 0.219 inches maximum

• Overall Diameter

  1.100 inches nominal

• Nonturn Device Type

  slotted bushing at 3:00 o'clock

• Operating Temp Range

  -65.0 to 125.0 deg celsius

• Switch Contact Basic Design

  nonpile-up symmetrical and nonpile-up nonsymmetrical

• Pole Quantity

  1 1st section front

• Pole Quantity

  1 2nd section front

• Pole Quantity

  1 6th section front

• Throw Quantity

  10 4th section rear

• Throw Quantity

  10 8th section rear

• Mounting Method

  threaded bushing single mounting facility

• Contact Voltage Rating In Volts

  28.0 dc at sea level

• Shaft Flat/Slot Angular Location

  180.0 degrees from contact position 1 single actuator

• Switch Actuator Indexing Position Quantity

  10 single actuator

• Shaft Type

  round, flatted single actuator

• Contact Switching Action

  breaks before makes 10th section rear

• Contact Switching Action

  breaks before makes 1st section rear

• Contact Switching Action

  breaks before makes 2nd section rear

• Contact Switching Action

  breaks before makes 4th section rear

• Contact Switching Action

  breaks before makes 6th section rear

• Contact Switching Action

  breaks before makes 8th section rear

• Switch Actuator Positioning Increment

  36.0 degrees single actuator

• Contact Load Current Rating

  3.0 amperes resistive load dc at sea level and 2.0 amperes inductive load

• Thread Length

  0.422 inches minimum single mounting facility and 0.452 inches maximum

• Hazardous Locations/Environmental Protection

  explosion proof

• Overall Length

  5.664 inches maximum

• Shaft Diameter

  0.248 inches minimum single actuator and 0.251 inches maximum

• Shaft Length

  0.844 inches minimum single actuator and 0.914 inches maximum

• Individual Section Quantity

  11

• Pole Quantity

  1 10th section front

• Pole Quantity

  1 4th section front

• Pole Quantity

  1 8th section front

• Throw Quantity

  10 10th section rear

• Throw Quantity

  10 1st section rear

• Throw Quantity

  10 2nd section rear

• Throw Quantity

  10 6th section rear

• Nominal Thread Size

  0.375 inches single mounting facility

• Contact Voltage Rating In Volts

  115.0 ac at sea level

• Thread Series Designator

  unef single mounting facility

• Test Data Document

  81349-mil-s-3786 specification

• Style Designator

  9 tap, circular, bushing mount

• Contact Load Current Rating

  5.0 amperes resistive load ac at sea level

• Terminal Type

  tab, solder lug

• Rotor Through Connection Quantity

  1 each section