*Type: threaded or smooth *Material: Stainless steel, steel, Delrin *Press fit, push fit,double-ended *Hex drive or slotted We manufacture all kinds of ball spring plungers.1) Smooth ball spring plungers with collar.2) Steel threaded ball spring plungers3) Ball plunger bolts4) Tapped ball buttons5) Flanged ball plungers6) ( function(){ var aBigImageSrc = [ 'http://i00.i.aliimg.com/photo/v2/ ...