Free Engineering Calculators, Plans & Guides for NZ Engineers

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Calculators

Calculate dimensions and specs

Videos

Get creative inpiration for your next project

Free Engineering Plans

Build a Go-Kart, Ute Canopy, Horse Float or more!

PDF Guides

Practical guides for planning, measuring, and installation.

Calculators

Round Plug and Square Plug Calculator

Matching Plugs

Filter by colour:

Your Specifications

Shape:
Outside Diameter (OD):
Inside Diameter (ID):
Wall Thickness:
Tolerance: ±1 mm on outside size

Videos

Free Engineering Plans

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PDF Guides

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PDF Inspiration

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