Material: threaded insert; internal is manufactured made of the highest quality brass, which guarantees resistance to corrosion. corrosion and conductivity thermal resistance, resistance to oxidation, hardness high, resistance to the deformation at high pressure and good durability. Features: Due to the geometry of the threaded sleeve, it is firmly attached to the threaded sleeve. on the pressure part. The knurled nuts with reverse spiral provide very balanced tightening and loosening torques and high tightening forces. Objective: the nut is made made of high quality brass, which has excellent conductivity; thermal resistance, resistance to corrosion, resistance to oxidation, hardness high, Christmasdeformation under high pressure and good durability. Original CNC kitchen thread insert for inserting 3D printed plastic parts (PLA, PETG, ABS, etc.) Scope of delivery: 50 threaded nuts in brass M2 x 4 mm.