1-1957M-2-2N

Technical Characteristics

• Thread Class

  2a single mounting facility

• Thread Length

  0.417 inches minimum and 0.457 inches maximum single mounting facility

• Overall Length

  2.185 inches minimum and 2.331 inches maximum

• First Flat Length

  0.230 inches minimum and 0.270 inches maximum single actuator

• Flat Height

  0.215 inches minimum and 0.223 inches maximum single actuator

• Mounting Method

  threaded bushing single mounting facility

• Nominal Thread Size

  0.375 inches single mounting facility

• Contact Voltage Rating In Volts

  115.0 ac at sea level

• Rotor Through Connection Quantity

  1 each section

• Contact Switching Action

  breaks before makes each section rear

• Contact Load Current Rating

  5.0 amperes resistive load ac at sea level

• Iii Hazardous Locations/Environmental Protection

  explosion proof

• Shaft Diameter

  0.248 inches minimum and 0.251 inches maximum single actuator

• Shaft Length

  0.834 inches minimum and 0.914 inches maximum single actuator

• Overall Diameter

  1.155 inches minimum and 1.185 inches maximum

• Nonturn Device Radius

  0.360 inches minimum and 0.390 inches maximum at 3:00 o'clock

• Individual Section Quantity

  2

• Nonturn Device Type

  tab at 3:00 o'clock

• Iii Operating Temp Range

  -65.0 to 125.0 deg celsius

• Switch Contact Basic Design

  nonpile-up symmetrical

• Pole Quantity

  1 each section front

• Throw Quantity

  2 each section rear

• Iii Shaft Flat/Slot Angular Location

  180.0 degrees from contact position 1 single actuator

• Switch Actuator Indexing Position Quantity

  2 single actuator

• Shaft Type

  round, flatted single actuator

• Terminal Type

  tab, solder lug

• Switch Actuator Positioning Increment

  60.0 degrees single actuator

• Iii Detent Rotational Torque Range

  8.000 to 115.000 inch-ounces single actuator

• Switch Actuator Stop Device Type

  fixed stop single actuator

• Style Designator

  9 tap, circular, bushing mount

• Test Data Document

  81349-mil-s-3786/4 specification

• Thread Series Designator

  unef single mounting facility