- These Knurl Thread Insert Nut can be widely used on the injection for tightly fixing.- Can be installed by ultrasonic or heat into blind hole, or in during injection.- No need to counterbore or countersink the boss hole since the insert has guide pilot.- Made of brass material, good thermal conductivity and heat resistance. Specification:Material: BrassThread Size: M3x0.5mmTotal Length: 10mm / 0.39"Outer Diameter(+0.5/-0mm): 5mm / 0.20" Package Content: 30 x Knurl Thread Inserts Nuts