1、Made of high quality carbon steel, wear-resistance, durable in use. 2、Steel thread inserts can effectively improve screw connection, greatly improving the reliability. 3、Strong resistance to vibration which can prevent loosening, enhance connection strength and improve connection. 4、These self tapping thread inserts can be installed directly without pretapping. It can be directly screwed into the specific hole reserved by the base metal. 5、Widely used in the automotive industry, rail vehicle industry, shipbuilding industry, household appliances, construction machinery, etc. Overview: Steel thread inserts can effectively improve screw connection, greatly improving the reliability. Used in all kinds of low strength materials, thread inserts can largely improve the wear resistance performance of screw connection, and avoid thread damage. Features: Made of high quality carbon steel, wear-resistance, durable in use. Steel thread inserts can effectively improve screw connection, greatly improving the reliability.  Strong resistance to vibration which can prevent loosening, enhance connection strength and improve connection. These self tapping thread inserts can be installed directly  without pretapping. It can be directly screwed into the specific hole reserved by the base metal. Widely used in the automotive industry, rail vehicle industry, shipbuilding industry, household appliances, construction machinery, etc. Specification: Material: Carbon steel Weight: 92g/ 3.2oz Surface treatment: Casehardened steel, zinc-plated Size & Quantity:  M2* 0.4-M 4.5* 0.5-6L     10PCS   M 2.5* 0.45-M 4.5* 0.5-6L  10PCS   M3* 0.5-M5* 0.5-6L       10PCS   M4* 0.7-M 6.5* 0.75-8L    10PCS   M5* 0.8-M8* 1.0-10L      10PCS   M6* 1.0-M9* 1.0-12L      10PCS   Package List: 10 x M2* 0.4-M 4.5* 0.5-6L 10 x M 2.5* 0.45-M 4.5* 0.5-6L 10 x M3* 0.5-M5* 0.5-6L 10 x M4* 0.7-M 6.5* 0.75-8L 10 x M5* 0.8-M8* 1.0-10L 10 x M6* 1.0-M9* 1.0-12L