Stylish insignia has a pin closure. Can be pinned on shirts, pants, shoes, coats, sweaters, bags, hats, helmets, etc. USAF - United Stats Air Force. US Air Force pilot wing insignia pin. This item is manufactured by a U.S. factory certified by The Institute of Heraldry. Air force, aviation pilot. MIL-DTL 3628_174. Nickel plated, mirror-like polished finish.