Pistons Below is our range of standard cylinder pistons The standard double-acting piston Standard compact double-acting piston Standard single-acting piston for light/medium duty applications Standard double-acting high-pressure piston with internal thread Standard double-acting piston with internal thread + locking pin Standard double-acting piston with internal thread Standard compact double-acting piston with internal thread Standard compact double-acting piston with internal thread + locking pin Standard single-acting plunger piston for cylinder with longer strokes Standard compact single-acting plunger piston for cylinder with longer strokes