Check the listing for details. 120Pcs M3x3x5.3mm Knurled Insert Nut, Brass I-Shaped Double-Pass Embedment Nuts. Condition: New. Listed at 10.52 USD. Description:Material - Our 3D printing nuts are made of brass material, with strong wear resistance, fine workmanship, beautiful appearance, corrosion resistance, heat resistance, high low-temperature strength, good mechanical properties, and strong and durable. You can use them for a long time.Design - Our nut inserts are designed with a cylindrical style for easy handling. The rounded strip design has a high profile and better load-bearing surface, ensuring a secure hold and evenly distributing the load. The unique groove knurling texture will not scratch your precious 3D printed parts; the smaller diameter at the front end of the nut allows it to be inserted precisely into the 3D printed hole; the angled thread knurling increases torque resistance for a secure hold.