10.9 Grade High Strength Torx Pan Head Tamper Resistant Screws Black Oxide Anti-Theft Round Head Fasteners M6 M8 M10 20~30Pcs

Manufactured from high-strength carbon steel with integral heat treatment to reach 10.9 grade, featuring excellent tensile strength and hardness for heavy-duty mechanical assembly.Black oxide surface treatment reduces oxidation and mild corrosion, enhances wear resistance and extends the service life of the fasteners.Torx pan head tamper-resistant structure cannot be disassembled by ordinary screwdrivers, providing reliable anti-theft protection for equipment housings and safety devices.Precisely rolled full thread with uniform smooth tooth profile, tightly meshed with nuts and threaded holes, maintaining stable fastening and resisting loosening under continuous vibration.Popular M6, M8, M10 specifications with optional 20–30Pcs small packs, suitable for machinery casings, outdoor equipment, engineering facilities and security equipment assembly.All data above are manual measurements of one batch; slight deviations may exist. Kindly consider carefully before purchasing. Unit: mm.Size M10*30 means thread diameter 10mm,thread length 30mm