Uxcell 50 Pack M4 Threaded Inserts Brass Heat Set Insert M4x7mm, OD 6mm Knurled Insert Nuts

Made of brass material, high hardness and durable. Provides good mechanical properties with increased corrosion and heat resistance. The embedding nut has a guide so there is no need for a counterbore or countersink. Smooth surface, firm and uniform, easy to install. Due to the embossing process on the outer diameter of the insert, it forms certain friction and bites force with the brass insert after forming, which can be fixed on the inside so that it will not fall off easily. Has a certain torsion and tension.