CAPTIVE SCREW

摘要

PURPOSE: A captive screw is provided to reinforce the rigidity and secure the fastening property by unifying the screw with the knob and preventing the surface corrosion. CONSTITUTION: A captive screw comprises a hollow cylinder-shaped bushing(500), a knob(100), and a screw(200). The bushing is fixed to the screw mounting hole of a plate. The knob is flexibly supported through a spring(400) in bushing and is slid along the outer circumference of the bushing. The screw is fixed at the center of the knob. The knob is injected when the bottom of the knob is open. The cap is inserted into the bottom of the knob. The cap is injected when the top end of the cap is open. The cap is inserted in the outer circumference of the bushing.