In stock full range M3, M4, M5, M6, M8: genuine **304 stainless steel hex socket cylindrical point set screws**, also called headless grub screws and anti-loosening stop screws. Integrally formed by precision machining, standard internal hex drive with cylindrical pointed end design, accurate thread tolerance and tight fit. 304 stainless steel material delivers superior **rustproof, corrosion-resistant** performance, high hardness and stable locking force, suitable for humid and corrosive working conditions. Headless flush installation keeps the surface smooth without protrusion; cylindrical tip realizes precise positioning, limiting and anti-loosening fixation, no slipping during equipment operation. Widely used in precision machinery, mold fittings, instruments, electronic equipment, automation hardware and mechanical assembly. Factory direct supply, sufficient stock, support bulk wholesale and non-standard customized size processing.