Frequently Asked Questions about Spanners & Wrenches
How do I choose the right spanner size for my project?
Spanner sizes correspond to the distance between their jaws or ring diameter, measured in metric or imperial units. Using the correct size ensures a secure fit, preventing damage to the tool or fastener.
What is the difference between metric and imperial spanners?
Metric spanners are sized in millimetres, while imperial spanners are measured in inches. It’s essential to match the spanner type to the fastener’s measurement system for a proper fit.
Can I use an adjustable spanner for all bolt sizes?
Adjustable spanners can fit various bolt sizes, but fixed-size spanners provide a better grip and are preferred for high-torque applications to avoid slipping.
What are ratcheting spanners and what advantages do they offer?
Ratcheting spanners have a mechanism allowing continuous turning without repositioning, making them faster and more convenient, especially in confined spaces.
How should I maintain and store my spanners?
Keep spanners clean and dry to prevent rust. Store them in an organised toolbox or rack, and inspect regularly for wear or damage to ensure safety and performance.
Can spanners be used on damaged or rounded bolts?
Special spanners like flank drive or gripping spanners are designed to grip the sides of fasteners rather than the corners, making them useful for working on damaged or rounded bolts.
What are flare nut spanners and when are they used?
Flare nut spanners have a partially enclosed head, offering better grip on soft metal fittings like brake or fuel lines. They're ideal for automotive and hydraulic applications.
Choosing the correct metric bolt size is essential in construction, engineering and DIY projects. Metric bolts, measured in millimetres, are widely used across industries for their precision and standardisation.
Spanners are a great addition to any toolbox, but which type should you use? Here is a guide to help you establish which spanner you need for your DIY project.
With so many different spanners available, how do you know which one to use? We’ve compiled a list so you can see what each spanner does and which you need.
Is a spanner the same as a wrench? Find out the specific uses of a spanner and a wrench to understand which will be the most effective tool for the job.
