Cage Nuts consist of a square nut in a spring steel cage which wraps around the nut. The cage has two wings that, when compressed, allow the cage to be inserted into the square holes in equipment racks. When the wings are released, they hold the nut in position behind the hole, making them easily replaceable. Variants included in this assortment range from #8-32 to 5/16-18 in fine & coarse thread sizes. Assortment also includes M6-1.00 coarse-threaded metric cage nut variants. Parts fit myriad common panel ranges. Full assortments of #44342 contain ten (10) refills comprised of Hillman item numbers #44343 - #44352.