This custom-made “rack tray” is specifically designed to hold up to three FMR Audio 1/3 rack products in a “1U” rack space.
Secure mounting is accomplished by utilizing a US-standard 10-32 “rack” screw that is placed through a dimpled hole in the tray up into a captive 10-32 nut built into the base of each 1/3 rack product. Since all 1/3 rack products have four rubberized feet, tightening the screw causes the unit to compress the feet, thereby holding the unit firmly and resisting loosening due to vibration.