320-0021-001

Technical Characteristics

• Special Features

  accommodates a 4-40 machine screw furnished with item

• Thread Quantity Per Inch

  40

• Mounting Facility Type And Quantity

  1 threaded hole

• Nominal Thread Size

  0.112 inches

• Style Designator

  polarizing boss

• Width Across Flats

  0.247 inches minimum and 0.252 inches maximum

• Material

  aluminum alloy

• Thread Series Designator

  unc

• Surface Treatment

  cadmium and chromate

• Thread Direction

  right-hand

• Overall Length

  0.330 inches minimum and 0.350 inches maximum

• Thread Class

  2b

• Nominal Thread Length

  0.175 inches