1.Type:Ball Spring 2.Material: SS, carbon steel, 3.Size: M2-M30, #2-56-1/4- ... 20 4,High quality,cheap price 1.Type: Ball spring2. ... Material: Stainless steel, carbon steel3. Thread Size: M2-M30, #2 ... Standard and non-standard available Threaded delrin body Staniless steel press-in ball nose spring plunger