DIN912 M3*12 D=5.5 SUS 304 hexagon socket A2-70 screw is a mini screw that combines strength and precision. The thin rod with a diameter of 3 mm and a length of 12 mm is matched with a 5.5 mm cylindrical head, which can achieve high torque locking in narrow cavities while maintaining overall lightweight; A2-70 grade SUS304 stainless steel makes its tensile strength ≥700 MPa, and it does not rust in salt spray for 96 h. It is a common micro screws solution in consumer electronics and industrial modules.
As a Precision screw, the thread accuracy is 6 g, and the head runout is ≤0.02 mm; the surface is electrolytically polished and passivated, with a low friction coefficient. The pre-coated microcapsule glue can output 25 N preload at a torque of 1.5 N·m, and the residual torque decay after 10⁶ vibrations is <2%, ensuring long-term anti-loosening.
After passing ASTM F837 certification, this part can be directly used as Aerospace Micro Screws for satellite payload brackets and dr…