Features HIGH QUALITY - These T-slot nuts use premium 45 steel,black oxide finish,which has high hardness,high strength,durable use. Applied: Used for T-slot aluminum extrusions to connect other parts. Blade Design The bottom of the T-slot nut is staked to prevent the bolt from protruding. CONVENIENT TO USE - T-slot nuts allow the user to add clamps to an accessory without disassembling existing clamps. 100% brand new and high quality. Descriptions: These T-groove nuts are made of 45 steel, black oxide finish, features high hardness, high strength, durable use.Used for T-groove aluminum extrusions to connect other parts.And T-groove nuts allow the user to add clamps to a fixture without disassembling existing clamps. Features: Made of 45 steel, black oxide finish, features high hardness, high strength, durable use. Insufficient size to fit machine table box. Used for T-slot aluminum extrusions to connect other parts. The bottom of the T-groove nut is staked to prevent the bolt from protruding. T-groove nuts allow the user to add clamps to an attachment without dismantling existing clamps. Budget: Material: steel 45 Surface treatment: black oxide Thread (Optional): M8 / M10 Size: as the picture Weight: 100 g, 138 g Package Included: 5 x T-slot nuts Package List