Slotted Type Thread Self Tapping Insert 

Slotted Type Thread Self Tapping Insert Self Tapping Inserts, also known as helicoils or threaded bushings, are designed to create a secure anchor within an untapped pilot hole. These engineering components can convert unthreaded holes for use with machine screws, and are particularly useful in housing materials which have a low shear strength, as the large diameter of the insert increases the thread engagement and load-bearing capabilities of a fastening. Self Tapping Inserts have the added benefit of reducing wear within machinery which requires frequent clamping and unclamping. Size& Type： Metric: M2-M30, with cutting slot, also for normal Inch sizes. M3-M24, with cutting bore, also for normal Inch sizes. Material:   Stainless Steel Case-hardened steel, zinc plated Brass Other material on request Finishes& Coating: Zinc plated (Yellow, Blue, etc.) Dry Film Lubricants