Applicable Size :1/4-20 Thread Size Steel T-slot nuts - CNC Clamping Widely Application : This steel roll in T-Slot nut is compatible with a wide range of T-slot accessories, making it suitable for various applications,including CNC machine,CNC laser cutters,building industrial aluminum frame structures,Robotics Projects and more. Nut Roll 80/20 13055 Self Aligning Roll-In T-Nut W/Ball Spring 10 1/4-20 Threaded Nut Abeicy 1/4"-20 Threaded Steel Roll In T-Nut With Ball Spring, T-Slot Nuts Accessory Hardware Nuts For 10 Series Aluminum Extrusion Profiles Rail (100 1/4-20 Threaded Steel Roll In T-nuts With Ball Spring Secure Fit: The ball spring ensures a secure fit, preventing any movement or slippage during use. T-Nut with Ball Spring offers easy installation and secure fastening in T-slot aluminum, featuring a ball spring mechanism for reliable positioning Durable Material: The steel roll in T-Slot nut with ball spring is made of high-quality steel, ensuring durability and long-lasting performance. Easy Installation: The T-Slot nut design allows for easy and quick installation into T-slot accessories, saving time and effort.