BGTXINGI 370PCS 15 Values M2 M3 M4 M5 Knurled Nuts Female Brass Threaded Insert Embedment Nut Assortment Kit for 3D Printing Projects

1.Nut type: Knurled nut. Special thread design make It easier to operate. 2. Normal size: M2 x 4mm x 3.5mm, M2 x 6mm x 3.5mm, M2 x 8mm x 3.5mm, M2 x 10mm x 3.5mm, M3 x 4mm x 5mm, M3 x 6mm x 5mm, M3 x 8mm x 5mm, M3 x 10mm x 5mm (Length x Outter Diameter), M4 x 4mm x 6mm, M4 x 6mm x 6mm, M4 x 8mm x 6mm, M4 x 10mm x 6mm , M5 x 6mm x 7mm, M5 x 8mm x 7mm, M5 x 10mm x 7mm (Length x Outter Diameter). 3.Durable material: It is made of brass material, heat resistance, wear-resistant, rust-proof, anti-corrosive, non-toxic, acid-resistant, and does not release harmful substances. 4.Super character: High hardness, no deformation, hardness and toughness are more than 10 times higher than aluminum, high processing difficulty, complicated production process. 5.Convenient tool: It is used for injection molding and is firmly fixed. Since the insert has a conduction valve, there is no need to back-drill and counter-sink the hole.