HEX blind nut open
OPEN End Blind Nuts FULL HEX BODY
With an open end style rivet nut allows the stud or male threaded component to thread through the nut without limiting the length or protrusion of the male threaded part.
The hexagon body rivet nuts make locating within a pre-drilled hole easier, reducing the time of the installation process.
Sometimes blind inserts turn in the hole when force is used to unscrew the bolt, or turning is caused by high vibrations. The hexagonal shaft prevents this turning, making this type of insert highly used in repair or servicing works.
They are inserted into hexagon drilled holes which prevent the rivet nut from turning or spinning after installation. 
This is a more reliable option to prevent rotation than the knurled round body nuts. However these require a hexagonal hole.
The hexagonal shape and large flange gives this type exceptional torque-to-turn strength in thin sheet materials while having safeguards against over-tightening which can lead to thread stripping and the need for expensive rework.
If excessive torque is applied, the screw shank fails before the insert as protection from over-tightening.
The full hex body affords a very good resistance to failure due to torque loads.
Full-Hex BODY Large Flange [FLAT Head] STEEL
Download product datasheet MS-ZN
Full-Hex Body Small CSK [Reduced CSK] STEEL
Download product datasheet MS-ZN