400 Pcs Heat Insert Threaded Nut, 3D Printing Brass Insert Nuts, M3 x 5 x 4mm YOU WILL GET 4 BOXES WITH 100 PC IN EACH Precision-crafted threaded insert nuts, ideal for creating durable and reliable fastening points in 3D printed parts and plastic assemblies. These inserts feature a knurled outer surface that provides excellent grip and pull-out resistance when embedded into a material. Designed for heat insertion or ultrasonic installation, they ensure a strong and permanent bond. Keywords: heat insert nuts, threaded insert, 3D printing inserts, brass insert, M3 insert, knurled insert, heat staking, ultrasonic insertion, fastener, hardware, plastic assembly, threaded nut, embedded nut Thank you for your support of American small business! INVENTORY NUMBER:EBM1 #Hardware #HomeImprovement #DIY #TechAccessories