What bolt, nut and washer do I use?
Let’s be frank. You can go nuts over bolts and if you try to learn all the nuts and bolts of bolts and nuts you’ll definitely go nuts and bolt! So, let’s look at just a few. Each comes in a variety of length, gauge, shape, material and strength. They all pass through a pre-drilled hole (See How to use a power drill ). They are either
made of, or coated with, varying materials for different purposes (see What metal type should a fastener be?). Their use can be modified by including a washer (see further on in this article).
The following is a list of commonly used bolts and their applications.
This has a hex (hexagonal) head. Long ones have a smooth shoulder under the head before the thread. Shorter ones are usually fully threaded. Used in metal, plastic and wood applications. The bolt goes through a hole drilled in the materials and is secured with a nut on the outer side.
Similar to a standard bolt but completely threaded. Used in a threaded or tapped hole. No nut needed.
Coach or carriage bolt
Used mainly through wood. It has a domed head with a square section beneath the head that penetrates the wood, holding the bolt more firmly. When building a
frame for your grapes, use two bolts to attach a crossbeam onto each post. Two bolts will prevent the beam from swivelling (like a wheel on an axle!).