TOP SCREW METAL CORP.

Cage nut can be assembled easily into position without the need for special tools and it is consists 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, and while released hold the nut in position behind the hole.

Using cage nuts mounted in square holes provides several benefits over threaded holes directly in the cage. First, one has the flexibility to choose the size of nuts and bolts at a time after the cage is installed.  Second, it is easy to  replace. Third, this can allow for a better strength-to-weight ratio, as only the nuts need to be made of a strong material suitable for threading.

The gap between the two wings determines thickness of material that will hold nut in correct position without pulling it from the base material. The size of square hole will also govern the position of nut. If size of hole is too large it will still pull out from base material. There are two types of cage nuts:

A) SLIDE-ON:

These nuts are used when rails are square punched because in such a case it becomes easy to move mounting hardware.

B) SNAP-IN:

These nuts are used for rails that are punched with square mountings in data cabinets.

The most common use for cage nuts is to mount equipment in square-holed 19-inch racks . There are four common sizes: 10-32 and to a lesser extent 12-24 are generally used in the United States; elsewhere M6 (6 mm outside diameter) for light and medium equipment and M8 for heavier equipment such as uninterruptible power supplies (UPSs).

reference by wikipedia.

CAGE NUT

MATERIAL AVAILABLE：
CARBON SPRING STEEL

SURFACE FINISH AVAILABLE：
YELLOW ZINC, ZINC, BLACK.

HARDNESS：
HRC 40-50.