| 摘要 |
PROBLEM TO BE SOLVED: To provide a fixed screw provided with a nut which is prevented from being lost when the nut is fastened too tight, the fixed screw being included in a portable circular saw for fixing cutting depth of a sawtooth at an optional position, by solving such problems that a conventional fixed screw has a fear of the nut from slipping from the screw shaft due to too tightened state or a fear of the nut from disengaging from a screw shaft due to addition of vibration in a fastened state. SOLUTION: A boss part 17 in which the screw shaft 2 is inserted at an inner peripheral side is provided in a blade case 15. The boss part 17 is provided with a flange 17a, and the nut 3 is provided with regulating arms 5a to 5a whose tip are bent. The tip bent parts 5b to 5b of the regulating arms 5a to 5a are engaged with the flange part 17a of the boss part 17 thereby regulating disengaging of the nut 3 from the boss part 17.
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