4PCs Aluminum Standoffs Round Tube Extension Support Round Sleeve Connector Rod Bar Stud Tube Nut M4 x 0.7mm Female Threads 60mm Length Robotics Accessories Round Coupling Nut_x005f_x000D_ Specification: Item Type: Standoff Model: 3501-0006-0600 Material: Aluminum Screw Hole: M4 x 0.7mm Outer Diameter: Approx. 6mm / 0.2in Length: Approx. 60mm / 2.4in Package List: 4 x Standoffs Application: Accessories in the field of robotics, supporting role, can be installed with idler wheels or bearings or as shafts._x005f_x000D_ _x005f_x000D_ - STANDARD THREADS -- Both ends have standard M4 x 0.7mm female threads, which makes the parts more precise when fixing_x005f_x000D_ - ROUND RODS CONNECT -- Standoffs can be used to space to surfaces apart, to tie parts together for additional structural support, to mount an idler or a bearing or as a shaft_x005f_x000D_ - MORE TIGHT CONNECTION -- The total length is 60mm, which extends the connection between the two workpieces, and the lengthened threaded connection will be more tight_x005f_x000D_ - ALUMINUM MATERIAL -- M4 support column is made of aluminum material, high strength and wear resistance, and it is not easy to deform after long‑term use_x005f_x000D_ - ROBOTICS ACCESSORIES -- The kit contains 4 aluminum standoffs, which are often used as accessories in the robotics field, and are easy to install and replace_x005f_x000D_ - _x005f_x000D_ - _x005f_x000D_ - _x005f_x000D_ - : _x005f_x000D_ - : _x005f_x000D_ - : _x005f_x000D_ - : _x005f_x000D_ - :