We supply high-quality M3 helmet nuts, specially designed for tactical bulletproof helmet installation and assembly. These black flat head M3 nuts adopt professional Dacromet surface treatment, featuring excellent anti-rust, corrosion resistance and wear resistance, stable performance for long-term outdoor and tactical use. With standard M3 thread specification and precise dimensional design, the flat head structure fits perfectly with tactical bulletproof helmet mounting positions, achieving flush installation, firm locking and no loosening. Exquisite workmanship ensures smooth thread engagement, easy assembly and disassembly, ideal for fixed installation and accessory matching of various tactical helmets and protective helmets. Widely applied in tactical equipment, protective gear, outdoor military supplies and safety helmet supporting accessories industries. Complete specifications, stable quality and black appearance meet tactical matching requirements. We support bulk wholesale and long-term supply, providing reliable standard fastener accessories for bulletproof helmet and tactical equipment assembly.