Descriptions:_x000D_ This T slot nuts are made of 45 steel, black oxide finish, features high hardness, high strength, durable in use. It is used for T-slot aluminum extrusions to connect other parts. Bottom of T-Slot nut is staked to prevent the stud from protrusion. _x000D_ _x000D_ _x000D_ Features: _x000D_ Made of 45 steel, black oxide finish, features high hardness, high strength, durable in use. _x000D_ Undersized to fit machine table slot case hardened._x000D_ _x000D_ It is used for T-slot aluminum extrusions to connect other parts. _x000D_ Bottom of T-Slot nut is staked to prevent the stud from protrusion. _x000D_ T-Slot nuts enable the user to add clamps to a fixture without tearing down existing clamps. _x000D_ _x000D_ Specifications: _x000D_ Material: 45 steel _x000D_ Surface treatment: black oxide _x000D_ Thread: M14 _x000D_ Size: as the picture _x000D_ Weight: 277g _x000D_ _x000D_ _x000D_ Package Included: _x000D_ 5 x T Slot Nuts