[Dimension] M6 x 18mm x 1mm / 0.24"x 0.71"x 0.04" ( Inner Dia* Outer Dia* Thickness)
[Highly Compatible] Universal with screws and bolts of same sizes and feature solid bearing surface to prevent nut/bolt head from tearing through material.
[Durable Construction] Cooper material to withstand use in automotive and electrical connection on household application with tighter seal.
[Preventing Dispersion and Loosening] Smooth surface can reduce friction between fasteners, preventing isolates, loosening and dispersion pressure.