1. What does “M3 × 25” mean in this bolt?
“M3” refers to the 3mm thread diameter, and “25” indicates the length of the bolt in millimeters measured from under the head.
2. What material is used in this bolt and why?
It is made from SS304 (Stainless Steel 304), which provides excellent corrosion resistance, durability, and strength for long-term use.
3. What tool is required to tighten or loosen this bolt?
This bolt uses a hex socket (Allen) head, so it requires an Allen key (typically 2.5mm for M3 bolts).
4. Where is an M3 × 25 Allen cap bolt commonly used?
It is widely used in electronics mounting (such as fixing Arduino Uno), robotics, 3D printers, CNC machines, and general mechanical assemblies.
5. Can this bolt be used in outdoor applications?
Yes, due to its SS304 material, it offers good resistance to rust and corrosion, making it suitable for indoor and light outdoor environments (though not ideal for highly saline or marine conditions).
