Features High quality:These T slot nuts uses premium 45 steel,black oxide finish,which has high hardness,high strength,durable in use. Applied for:It is used for T-slot aluminum extrusions to connect other parts. Cleaver design:Bottom of T-Slot nut is staked to prevent the stud from protrusion. Convenient to use:T-Slot nuts enable the user to add clamps to a fixture without tearing down existing clamps. :100%brand new and high quality. Descriptions: These 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. And T-Slot nuts enable the user to add clamps to a fixture without tearing down existing clamps. Features: Made of 45 steel, black oxide finish, features high hardness, high strength, durable in use. Undersized to fit machine table slot case hardened. 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. T-Slot nuts enable the user to add clamps to a fixture without tearing down existing clamps. Specifications: Material: 45 steel Surface treatment: black oxide Thread(Optional): M8/M10 Size: as the picture Weight: 100g,138g Package Included: 5 x T Slot Nuts Package List