We supply high-quality 304 stainless steel hexagon flat end set screws complying with GB77 and DIN913 standards, also known as positioning jack screws and headless grub screws. Made of premium 304 stainless steel material, these flat end set screws feature excellent rust resistance, corrosion resistance and durable mechanical performance, adapting to humid, outdoor and harsh industrial working environments. Adopting inner hexagon drive and flat end design, the 304 stainless steel set screws enable precise positioning, tight fastening and effective anti-loosening locking. The flat end fits closely with mounting surfaces without damaging workpieces, while the headless flush installation keeps equipment surface smooth and tidy, perfect for limiting, fixing and spacing adjustment. Widely applied in precision machinery, mold accessories, instrumentation, electronic equipment, automation components and hardware assembly industries, GB77 and DIN913 standard flat end grub screws boast accurate thread tolerance and fine workmanship. We provide complete size specifications, support bulk wholesale and long-term stable supply, delivering reliable positioning and fastening solutions for industrial precision assembly and mechanical locking.