JW Winco Glass Filled Nylon Plastic Eight Lobed Hand Knob with Tapped Through Insert， Partially Threaded Through Hole， M12 x 1.75 Thread Size x 18mm Thread Depth， 55mm Head Diameter (Pack of 1)<img src="http://ecx.images-amazon.com/images/I/31WiKl7bRmL.jpg" noproxy>