Color as shown Weight: 211 g Material: carbon steel. Nickel-plated T-nuts for good rust resistance and better performance, high hardness and long service life. 3 kinds of T-nuts packed in a durable transparent plastic box, M3 60pcs, M4 60pcs, M5 60pcs, in total 180 pieces, meet your different needs . T-nuts are used to insert into the aluminum frame and connect with a T-bolt or other. Suitable for door handles and machine industry, they are also easy to use and convenient for connecting aluminum profiles. Application: Stainless steel T nuts are suitable for 20 series aluminum profiles, which are often used in the construction of industrial Aluminum frame structures, 3D printers, CNC laser cutters and robotics projects. /p> Package includes: 180 pieces nuts. The wire diameter is 3mm (M3), 4mm (M4), 5mm (M5).