Material: threaded insert; Made in-house from high-quality brass which ensures corrosion resistance. Thermal resistance to corrosion and conductivity, oxidation resistance, high hardness, resistance to deformation under high pressure and good durability. Features: The geometry of the threaded sleeve means that it is firmly connected to the threaded sleeve at the pressure part. The counter-spiral knurled nuts ensure very balanced tightening and loosening torques and high clamping forces. Purpose: The nut is made of high-quality brass, which has excellent conductivity; heat resistance, corrosion resistance, oxidation resistance, high hardness, no deformation under high pressure and good durability. Original CNC kitchen threaded insert for inserting 3D printed plastic parts (PLA, PETG, ABS, etc.) Package includes: 50 M2 x 4 mm brass threaded nuts.