Table with different bolts and screws types.

Bolts and screws are essential fasteners in engineering. Bolts need a nut to secure, while screws create their own thread in the material.
Key Standards:
- ISO (International) – Global standardization for precision and compatibility.
- EN (European Norm) – Ensures quality across Europe.
- DIN (German) – High-precision standards from Germany.
Each standard defines dimensions, materials, and strength. Choosing the right fastener ensures durability and safety in construction, machinery, and automotive applications.
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