Carbon Steel T-slot Hardware M6 T Nut MroMax 15Pcs T Slot Nuts M6 Thread Hammer Head T Hammer Head Drop In T-nuts For Aluminum Profile Material : Carbon Steel; Color : Silver Tone M6 T Nut MroMax 15Pcs T Slot Nuts M6 Thread Hammer Head T Slot Drop In T- Nuts Sliver Tone For 40 Series Aluminum Profile Zinc Plating Steel T Slot Total Size : 20x8x8mm; Thread Size : M6 These high-performance connecting elements enable flexible and secure installation of accessories and add-on parts on aluminum profiles 1., Made of high-quality carbon steel nickel-plated., 2., Suitable for aluminum profile extrusion slot., 3., Easy to be roll into T slot of aluminum profile., 4., Could be used together with T screw/hex screw Buy Rierdge 50 Pcs 3030 Series Sliding T Nuts Metric M6 Thread Slide In Hammer Head T Nut Sliding T Nuts For Standard 8 Mm T Slot Aluminum Extrusion Profile Made from high quality carbon steel, these nuts have high hardness and a long service life surface is Nickel-plated for good rust resistance and better performance