Captive Screws
Captive screws basically are specially designed to lock into position in a hole, enabling easy setting up and removing of the attached pieces even without the complete removal of the screw.
They provide a secure joining, and avoid fastener loss or damage that might be caused by a loose part.
Captive screws come with Philips, Allen head or standard heads that are designed for usage with drill equipment and ordinary screwdrivers. Captive screws can be found in 
several configurations and sizes much like the conventional screws premeditated to be utilized for large number of applications.
Material: Stainless Steel AISI-304.
several configurations and sizes much like the conventional screws premeditated to be utilized for large number of applications.Material: Stainless Steel AISI-304.
SS-316 on special order.
Size Range: M2 to M6 in ready stocks
Size Range: M2 to M6 in ready stocks
Installation of Captive Screws
Using a retaining washer
To install a captive screw on a panel using a retaining washer, the screw is first passed through a hole in the panel. The washer is then screwed onto the captive screw, until the reduced diameter section is reached, retaining the screw on the panel.Using a retaining flange
To install a captive screw using a retaining flange, the flange is first pressed onto the panel. The captive screw is then screwed into the flange until the reduced diameter section is reached and the screw is retained.