Jergens 30775 Threaded Spring Plunger

M12 x 1.75, 20.5mm Thread Length, 6.5mm Plunger Projection, Steel Threaded Spring Plunger 6.3mm Max Plunger Diam, 20.5mm Plunger Length, 0.77 Kg Init End Force, 3.86 Kg Final End Force