TAC Mechanical Valves are miniature pneumatic 2, 3 and 4-way Push Button style, plunger valves available in 10-32 UNF, 1/8 and 1/4 PIPE sizes. Compact and rugged, TAC valves feature work hardened button plungers that bottom out on a threaded collar to prevent overstroke and damage. Excellent flow. Use threaded collar for panel mount and/or button plunger positioning, or to add a number of mechanical operators. Select optional operators from roller ball, roller cam, one way trip cam, or heavy duty cam mechanical operator.