17957-21

Technical Characteristics

• Nominal Thread Size

  0.086 inches 2nd mounting facility

• Switch Actuator Positioning Increment

  45.0 degrees single actuator

• Mounting Facility Pattern

  four position rectangular 1st mounting facility

• Overall Height

  2.810 inches nominal

• Style Designator

  tap, circuit selector

• Err Default

  err default

• Features Provided

  actuator knob

• Precious Material

  silver

• Knob Manufacturer Part Number

  g

• Thread Class

  2a 2nd mounting facility

• Nominal Thread Size

  0.190 inches 1st mounting facility

• Mounting Method

  threaded stud 2nd mounting facility

• Precious Material And Location

  rotor and stator contact surfaces silver

• Thread Series Designator

  unc 1st mounting facility

• Contact Voltage Rating In Volts

  125.0 ac at sea level

• Hazardous Locations/Environmental Protection

  explosion proof

• Longest Horizontal Distance Between Mounting Centers

  2.300 inches nominal 1st mounting facility

• Terminal Type

  tab w/screw

• Pole Quantity

  2 each section rear

• Thread Class

  2b 1st mounting facility

• Thread Series Designator

  unc 2nd mounting facility

• Mounting Method

  bracket 1st mounting facility and threaded hole 1st mounting facility

• ~1

  data on certain environmental and performanc

• Shaft Length

  2.530 inches nominal single actuator

• Individual Section Quantity

  25

• Longest Vertical Distance Between Mounting Centers

  2.300 inches nominal 1st mounting facility

• Overall Width

  2.810 inches nominal

• Switch Actuator Stop Device Type

  fixed stop single actuator

• Thread Quantity Per Inch

  24 1st mounting facility

• Square Shaft Size

  0.250 inches nominal single actuator

• Knob Manufacturer Code

  82121

• Throw Quantity

  2 each section rear

• Test Data Document

  81349-mil-s-21604 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

• Contact Switching Action

  makes before breaks, breaks before makes each section rear

• Specification/Standard Data

  81349-mil-s-21604/5 government specification

• Contact Load Current Rating

  10.0 amperes resistive load ac at sea level

• Shaft Type

  rectangular/square, threaded hole single actuator

• Switch Actuator Indexing Position Quantity

  2 single actuator

• Switch Contact Basic Design

  nonpile-up symmetrical

• Overall Length

  14.030 inches nominal

• Thread Quantity Per Inch

  56 2nd mounting facility