Military buttons are buttons intended to be used on any of our military jackets, non military jackets, and shirts. These are extra buttons for coats such as peacoats, M-65 jackets, military BDU coats, military ACU coats, N-2B and N-3B. Our military buttons are predominantly sewn-on buttons. Flat or sew-through buttons have two or four holes punched through the button through which the thread is sewn through to attach the button. Flat buttons may be attached by a sewing machine rather than by hand, and may be used with heavy fabrics by working a thread shank to extend the height of the button above the fabric. Extra buttons are a must when buttons on your jacket fall off and need to be replaced. Military buttons serving as fasteners work by slipping through a fabric or thread loop, or by sliding through a buttonhole.