There are two sets of mounting holes on the Vernier wired (BTA) accelerometers for attaching the accelerometer firmly to an experiment setup, when necessary. Each pair of mounting holes is 30 mm apart (measured center-to-center). Each mounting hole is 4 mm in diameter.

Low-g Accelerometer (LGA-BTA)
25-g Accelerometer (ACC-BTA)
3-Axis Accelerometer (3D-BTA)