Grounded 12 Volt Steel Case Solenoids from Buyers Products come in a steel case and offer reliable switch operation for your snow plow, lift gate, spreader, or crane. The B98596 unit uses positive 12V of power to activate the solenoid. With the 1306505 unit, a ground connection applied to the center terminal will activate the solenoid. Both feature 5/16 in.-24 thread terminals and are insulated for long-lasting reliability for heavy duty electric motor needs.