SCREW BOLT

PROBLEM TO BE SOLVED: To provide a screw bolt inexpensively manufacturable and placeable into a work material by a manual placing device without a trouble similarly to an existing bolt. SOLUTION: This bolt screw includes: a fixing part 13; a load application part 12 having a thread 15; and a head 11. The load application part 12 is provided with a pin-like core region 17, and the core region 17 is integrally formed with the fixing part 13 and the head 11. The core region 17, the fixing part 13 and the head 11 are formed from a metal, and a threaded sleeve 16 made of a synthetic resin material and provided with the thread 15 is fixed to the outside in the radial direction of the core region 17. Desirably, the threaded sleeve 16 is formed by injection molding on the core region 17, and the core region 17 is provided with a fixing means 19 for fixing the threaded sleeve 16 not to rotate. More desirably, the threaded sleeve 16 is formed from a glass fiber reinforced synthetic resin, and the core region, the fixing part and the head are formed from a stainless steel. COPYRIGHT: (C)2010,JPO&INPIT