Best fixing for glass clamp to timber?

[Ian H]

Would it be a pan head screw with a washer or is there something better?

Thanks

 

[Ian H]

The instructions show an M8x20 bolt to fix into metal and that looks to have a washer on:

But nothing for wood.

 

[foxhole]

Pan head should be fine.

 

[Tigercubrider]

what about either a T nut or insert?
Then you could use the original bolts

 

[Ian H]

The bolts weren’t included. I think the basket symbol means you have to go and buy them.

I’ll get the fattest 20mm pan head I can find. Thanks

 

[Ian H]

Which would be thicker? A 4x20mm or a 3/4x8?

 

[foxhole]

Metric Imperial Screw Conversion Chart
Gauge-----Metric diameter (mm)-----Pilot Hole size (mm)
3----------------------2.5--------------------------1
4-----------------------3 --------------------------1.5
6----------------------3.5--------------------------2
8 -----------------------4 -------------------------2.5

 

[Ian H]

Both the same size

 

[catlad]

Not quite 3/4 is what 18mm ply is now

 

[Ian H]

I might go a bit longer, the baserail is 30mm thick and the handrail 60mm.

 

[Ian H]

I got the pan heads but the head isn’t big enough so i’ll have to use a washer as well

The clamps are Q-Railing Model 21 .

 

[conny]

I would suggest a shake proof or spring washer under the head to prevent loosening during opening and closing.

 

[Ian H]

I’ve just found a video and it shows an inset into the wood and then the clamp bolted.

Anyone know what the insert would be called and if that would be better than the pan heads?

 

[Ian H]

They sell them at Screwfix but i’d be a bit worried about drilling the bigger hole perfectly.

https://www.screwfix.com/p/insert-nuts-type-d-m6-x-13mm-50-pack/59937

 

[rsgaz]

Your photo further up shows they recommend M8 bolts, so I'd stick to that if I were you, and get some...

https://www.ebay.co.uk/itm/362331480104

There are non flanged (type E) ones like above and flanged (type D) ones like...

https://www.ebay.co.uk/itm/163065755299

Non-flanged allows you to go deeper into the wood for a stronger fixing.