Nylon self-locking nuts, locking fixation with locking nut deputy in the installation process, the bolt threads on the nut embedded nylon extrusion, making nylon deformation, after installation, nylon and thread completely squeezed contacts the bolt is extruded nylon resilience generates a strong, increasing the friction and the force is not easy to loosen the bolt, nylon itself acid, nuts are stainless steel and carbon steel material. Nylon ring with blue and white glue glue two options. Stainless steel locknut is our flagship product, mainly from the anti-loosening effect. There are: M4X0.7, M5X0.8, M6X1.0 other standard parts and non-standard parts. Nylon ring are: blue gum and white glue. Nepalese cap DIN985 Hex Size on the edge thickness (min) Total thickness M3X0.5 5.32-5.5 2.4 3.7-4 M4X0.7 6.78-7 2.9 4.7-5 M5X0.8 7.78-8 3.2 4.7-5 M6X1.0 9.78-10 4 5.7-6 M7X1.0 10.73-11 4.7 7.14-7.5 M8X1.25 12.73-13 5.5 7.64-8 M10X1.5 16.73-17 6.5 9.64-10 M12X1.75 18.67-19 8 11.57-12 M14X2.0 21.67-22 9.5 13.3-14 M16X2.0 23.67-24 10.5 15.3-16