What are Coach Bolts and Coach Screws? | Product Showcase
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- čas přidán 21. 08. 2024
- In this video, we cover Coach Bolts and Coach Screws
Coach bolts, also known as carriage bolts, are a type of bolt designed specifically to be used in woodworking. In particular, they are intended to be used for fastening metal to wood.
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Coach screws have a hexagon head and a thread for screwing directly into wood. Coach screws are essentially a heavy-duty screw for timber use.
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Thanks for the info mate. Exactly what I needed to know :).
thanks - what I needed to know - short and sweet !
Thanks for your feedback - we're glad you found it helpful.
So where do you insert the washer? Does it fit under the cup head of the bolt or do I have to insert the bolt first, into the timber and then insert the washer and nut afterwards? Hope this makes sense?
'To avoid accidentally counter-sinking the screwhead' the washer needs to sit between the head of the thing that's being driven and the timber. So if you're driving a coach screw in, you'd have the washer on the screw head size. For a coach bolt (square head with a round cap) you put the bolt in the hole and then tighten the nut onto the timber. In this latter case, it's the nut that's being driven (up the shaft of the bolt and tightened against the timber) so you'd place the washer onto the shaft of the bolt first, between the nut and the timber. Hope this helps?
You can use a washer on the head side of the coach bolt but you will have to use the next size up. This is so the washer can fit over the square under the head which tends to be bigger than the thread diameter. For example, if you have a M6 coach bolt, you will need a M8 washer to fit. If you wanted just one washer on the nut side, you will just need the same sized washer as the thread. So if you had a M6 coach bolt you will need a M6 washer. Hopefully, this answers your question but let us know if you need any more info. Best of luck with your project!
Are these heat treated ?