QSJ 240Pcs Threaded Insert Bolt Assortment kit 120Pcs M3 x L4 x D5 Heat Set Brass Nut, 120Pcs M3 x 5 Stainless Steel Black Bolt for Industrial 3D Printing Projects

QSJ 240Pcs Threaded Insert Bolt Assortment kit 120Pcs M3 x L4 x D5 Heat Set Brass Nut, 120Pcs M3 x 5 Stainless Steel Black Bolt for Industrial 3D Printing Projects

• 【Complete Kit for Secure Fastening】 Includes 120 M3 x L4 x D5 brass heat-set inserts, 120 M3 x L5 black stainless steel bolts, and 1 M3 soldering iron tip — all in a compact dual-compartment box.
• 【Durable Materials】 Brass threaded insert offer excellent wear resistance, and 304 stainless steel bolts ensure strong corrosion resistance and long-lasting performance.
• 【Simple and Efficient Installation】 First install the heat-set nut by heating it with a heated soldering iron until the plastic part melts slightly, letting the nut settle into the pre-drilled hole.As it cools, insert the black bolt and screw it into the nut.
• 【Perfectly Matched Pair】 The M3×L5 bolt fits precisely with the M3×L4×D5 threaded insert, ensuring a tight, stable connection and reducing the risk of stripping or loosening.
• 【Perfect for 3D Prints】 Great for reinforcing joints in 3D printed enclosures, models, and accessories — widely used in prototyping, hobby builds, and more.