Item Type: Self Tapping Threaded Insert Model: Slotting Threaded Insert Quantity: 20pcs Material: Stainless Steel Product Size: Female Thread: M4 x 0.7 Male Thread: M6.5 x 0.75 Length: Approx. 8mm / 0.31in Reference Drilling Diameter: Approx. For Plastic: 5.8 ~ 5.9mm / 0.23 ~ 0.23in For Alloy: 6.0 ~ 6.1mm / 0.24 ~ 0.24in For Cast Iron: 6.1 ~ 6.2mm / 0.24 ~ 0.24in Minimum Drilling Depth: Approx. 10mm / 0.39in Package List 20 x Self Tapping Threaded Insert 1Smart Self Tapping: No need for threading the workpiece, the self tapping threaded insert can easily drill deep into the material without seam. 2Larger Application: Widely applied to automobile, shipbuilding, household appliances, construction machinery, electronic products and so on. 3Standard in Design: Designed to have M4 x 0.7 female thread, M6.5 x 0.75 male thread and 8mm length, the threaded insert ensures no loosening. 4With Good Material: Adopting premium stainless steel, the thread insert nut is very sturdy with impact, and very durable for long term using. 5Convenient Carrying: Comes with a light weight and a compact size as well, the insert nut is very convenient to carry for outdoor working.