Check the listing for details. 120Pack M3 ID x 4mm L x 5mm OD Knurled Insert Nuts for Plastic Shells. Condition: New. Listed at 15.84 USD. Description:Made of brass material, with high hardness, durability, good thermal conductivity 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.These Knurled Insert Nut can be widely used on the injection for tightly fixing.Can be installed by ultrasonic or heat into the plastic matrix, or formed during the injection.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 cannot fall off. Has a certain torsion and tension.Specification:Material: BrassFinish: Vibration PolishingThread Size: M3 x 0.5mm(Dia*Pitch)Overall Size: 5mm x 4mm / 0.20" x 0.16"(OD*L)Package Content:120 x Knurled Insert Nut.