Specification: Brand Sulev Model M3AN1 Thread diameter 3 mm (M3) Material Alloy 39;6061 Aluminum + Nylon Color Gray / Light Blue / Black / Red / Purple / Silver / Royal / Gold / Pink / Orange / Green Size As Picture ;Image Shown Field 0.5mm Surface Anodic Oxidation Features: 1. Made of 6061 aluminum alloy, lightweight, high hardness, secure. 2. Self-locking design will not loosen easily due to vibration. 3. Suitable for FPV RC. Package included: 10 x self-locking nuts