Drill bit sizes

Drill Size Chart

How to Tap a Hole: Tapping a hole is the process of creating threads on the sides of a drilled hole to enable screwing in a bolt or machine screw. This instructable will focus on primarily the use of taper taps, although there will be some mentioning of bottoming taps…

Suppose I want to pre-drill for, say, a 5/16 screw. How do I determine the correct drill bit diameter?

Easy-to-use printable tap drill chart and drill bit sizes table available for a FREE download on our website. View drill and tap chart ---->

Before you can decide which type of drill bit to use for a particular job, you would want to first know their construction and recommended application.

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all measurements correspond to standard bit sizes.Today, we’ll cover a drill bit size chart, so you can ensure you always have the right tool for the job...

Picture based reference guides for anything and everything. If it seems like something someone might print, physically post, and reference then it...

Who knew there was so much to know about pilot holes and countersinks?

Part screw & part bolt—lag screws are a beast of their own. Checkout our chart for drilling lag screw pilot holes in softwoods & hardwoods.