The package contains 30pcs M4 x 6mm x 6mm brass thread nuts.

Made of high-quality brass material, high strength and hardness, strong heat resistance, strong oxidation resistance; uniform tightening force. Compared to aluminum and copper, brass is stronger and more durable, giving you a longer lifespan.

Knurled nuts with high precision and deep threads are compatible with corresponding screws and avoid slipping. The surface is smooth and burr-free, standard round, firm and uniform, and easy to install.

These threaded insert nuts can be ultrasonically or heated into threaded tapered holes, or formed during the injection molding process. No countersinks or countersink boss holes are required because the inserts are guided.

Ideal for injection molding for tight fixation, hot threaded taper holes and ultrasonic mounting; widely used in laptop plastic enclosures, 3D printers, automotive, electrical injection molding and various plastic enclosures.