These adapter plates permit the mounting of standard English ¼-20 or Metric M6 x 1.0 and M16 x 1.0 components to the top of our translation stages and ball bearing slides. Use dimension “A” below to match the width of the top plate with the width of the ball bearing slide or translation stage (not all slides conform to this). Counterbore “E” and spacing “B” must also match the top mounting holes and spacing of the stage or slide. M16 hole is not available for 1.25" top plates. Please see diagram below for more details. All dimensions are in inches.