SEVERAL MECHANICS WERE INSTALLING PIN & COLLETS FOR TILT CYLINDER ON A LOADER. ONE COLLETT WAS BEING INSTALLED WHEN IT FELL (SLIPPED) BELOW AND HIT EE ON HEAD. SUPERVISOR INSTRUCTED EE TO GET THE CUT LOOKED AT, AT BATTLE MOUNTAIN HOSPITAL, WHICH HE DID. 6 STITCHES AND RELEASED, NO LOST TIME.