Any fasteners gurus in the house?

format is M6x12 etc where MX is the diameter in mm and the second part is the length in mm. Head nomenclature varies so do your googling to find what you want, ie cap head machine screw etc

 

M5 refers to the diameter of the threaded shank.....these can be whatever length (eg 20mm)
they may also specify the thread pitch, but for woodscrews, I doubt it...unless otherwise stated, you'll either get metric fine or metric coarse for machine screws/bolts/nuts etc.

http://www.roymech.co.uk/Useful_Tables/Screws/cap_screws.htm

for screwing into wood I'd always opt for Fischers or Reisser....

 

you don't buy wood screws based on an M number like you do bolts, screws are usualy something like 4 x 100mm, 6 x 100mm or 8 x 100mm, the second number is the length the first number is the head size in mm

 

also the length is to the tip of the screw, so if screwing through 15mm board, with a cup, youd want 25mm min

 

Also just found this if it helps -

http://almabolt.com/pages/catalog/screws/machine.htm

It s abit Yankee but might help!

 

https://www.boltdepot.com/fastener-information/Wood-Screws/Wood-Screw-Diameter.aspx

 

For flat head screws eg not countersunk heads try searching Pan head
Machined M5 etc, are threaded like nuts and bolts
No. screws are wood screws. For little things use 4's or 6's . 10's and 12's are the sort used for screwing bits of 4x2 and alike together.

 

they may come in handy for the nursery....or fixing stuff when the little 'un starts swinging on things....

 

Screwfix are quite good for wood screws, if you know what size you want. B&Q will charge you £3 ish for 25/30. Screwfix will sell you a box of 100 for less. Again depending on size.

 

Woodscrews are old Imperial sizes, I think. Unlike metric, the numbers don't relate to size, as far as I'm aware. Self-tapping screws are also similar in sizing to woodscrews, although you can get metric ones.

 

Agreed. http://www.wlfuller.com/html/wood_screw_chart.html

 

Who else finds the work "shank" mildly arousing?

 

just you.....perv

 

Plain Shank is always a little disappointing.
Tony

 

WHS... but the mistake I always make is that the screw number for wood screws is completely alien to what you thin kit is!! a number 6 screw is significantly smaller than 6mm.

Screwfix tend to list them by number, B&Q tend to list them by the mm.

Odd when you consider there part of the same company

 

old school

 

I'm only 5'10", does that mean I do or don't get them cheap?