Dowel pins are precision-engineered cylindrical fasteners used to align and join components in machinery, construction, and furniture manufacturing. They are installed into matching holes to ensure accurate positioning and prevent lateral movement between assembled parts. Available in metal, plastic, or wood, with steel dowel pins being the most common for industrial applications requiring high shear strength and dimensional stability.
Applicable Standards
- ASME B18.8.2 (Inch series hardened ground dowel pins)
- DIN 6325 / ISO 8734 (Hardened steel and martensitic stainless steel dowel pins, Ø1-20mm)
- DIN 7979 / ISO 8735 (Dowel pins with internal thread for blind hole applications)
Materials
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Steel: Carbon steel, alloy steel, hardened steel (HRC 60±2), 52100 bearing steel (SUJ2)
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Stainless Steel: Austenitic (304) for corrosion resistance, martensitic (420, 440C) for hardness
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Non-Ferrous: Aluminum (lightweight, corrosion-resistant), Brass
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Others: Resin (Bakelite) for electrical/thermal insulation
Surface Treatments
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Plain finish
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Black oxide (MIL-C-13924)
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Zinc plating
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Passivation (for stainless steel)
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Phosphate coating (DOD-P-16232)
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Cadmium plating (QQ-P-416)
Common Applications
Automotive engine and transmission assemblies, aerospace components, industrial machinery alignment, precision tooling and fixtures, furniture joints, and construction (joining stone and concrete).
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