Jergens 30470 Threaded Spring Plunger

M4 x 0.7, 16mm Thread Length, 2.5mm Plunger Projection, Steel Threaded Spring Plunger 1.78mm Max Plunger Diam, 16mm Plunger Length, 1.22 Kg Init End Force, 3.29 Kg Final End Force, 2mm Hex