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Hollow Dowel / Spacer / Standoff

A hollow dowel is a cylindrical spacer component with a central through-hole, designed to provide precise spacing, guiding, or alignment between mechanical parts.

It can serve as a locating sleeve or a screw-mounted spacer, and is widely used in mechanical assemblies, electronic devices, modular designs, and applications requiring structural stability.

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Product Features

  • Hollow design allows passage of screws or guide pins

  • Stable outer and inner diameter tolerances for precise assembly

  • Versatile function: spacer, stopper, or guide sleeve

  • Customizable inner diameter, length, and end chamfering

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Material & Surface Treatment

  • Carbon Steel (S45C / C1018)
    • Surface finish: zinc plating
    • Good rigidity and cost-efficiency for general mechanical or industrial use

  • Stainless Steel (SUS304)
    • Excellent corrosion resistance
    • Suitable for outdoor equipment, automation systems, electronics, and medical structures

  • Aluminum Alloy (AL6061)
    • Lightweight, excellent thermal conductivity and machinability
    • Ideal for weight-sensitive designs and electronic assemblies

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Size Range

  • Outer diameter: Ø3mm – Ø20mm (custom sizes available)

  • Inner diameter: Ø1mm – Ø16mm (tolerance can be specified)

  • Length: 5mm – 100mm, with support for custom non-standard lengths

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 Applications

  • PCB board spacing and support in electronic devices

  • Gap control in automated equipment modules

  • Mechanical limit stops or linear guides

  • Spacer components for structures requiring through-screw design

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Customization & Notes

  • This product is compatible with MISUMI and McMaster-Carr part numbers for standard Spacers / Hollow Dowels / Standoffs.
    Custom tooling and non-standard dimensions are available based on drawings.
    Feel free to contact us with part numbers or design files for a quote.

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