US DOD surplus M228 Practice Grenade Fuze Head. Comes with: blue spoon, spring kit, and jungle clip (not pictured). The threads are 5/8-11" and will fit new cast iron grenade bodies: pineapple, lemon, & baseball that are the most common. It will not fit original Mk2 or 1960s lemon grenade bodies as they have 9/16-12" threads. May have oxidation or dirt on fuze heads - they are surplus heads recovered from military ranges.