M10 x 1.0 Fine

I have a small project planned that requires a spring to be retained by an M10 “threaded object”. I discovered some time ago how much nicer and easier it is to produce fine threads in M10 and M12 so I hoped to use M10 x1.0. I normally get my fasteners on the auction site but I’ve found it very difficult to get anything in that size and pitch except for bolts which are far too long or shipped from China.
I then happened upon these. I’m hoping they do the job and lock in place nicely without thread lock etc. Not so expensive that I can’t put it down to experience if they don’t work as intended. I didn’t realise that M10 x 1.0 fasteners were so rare, I’ll have to buy an M10 x 1.25 tap I suppose for future projects.

10 x 1 was/ is a common thread for lamp holders, the fitting is often brass. 8 x 1 is also not uncommon. Noel.

I succumbed and ordered some M10 x 1.0 stainless socket screws from China. They are cheap enough but not due to arrive until the second week of February - and that obviously dependent on RM strikes.

M10x1 is spark plug thread, so finding a tap should be easy.

If I have to buy on-off taps or dies I usually go to Tracy Tools first.

Vic,

That offer is for taper thread plugs. Is that what you are after? I would have thought that a spring retainer would need a parallel thread.

I didn’t realise that M10 x 1.0 fasteners were so rare, I’ll have to buy an M10 x 1.25 tap I suppose for future projects.

Standard M10 Coarse thread is 1.5 pitch, not 1.25 ?

I have only come across M10 x 1 (and M8 x 1) for hydraulic fittings, hence the tapered pipe plugs you show a listing for. IIRC the last M10x1 pipe plugs I ordered were for blanking an outlet on a VW Type 2 master cylinder. M8x1 is a standard size used on lubrication fittings for central lube system restrictors.

Nigel B.

Noel, Im surprised by what you say about lamp fittings as I have always used 3/8 BSB?

Yes I know, as I mentioned no big deal if it doesn’t work out.

Posted by Pete Rimmer on 01/01/2023 11:20:23:

M10x1 is spark plug thread, so finding a tap should be easy.

If I have to buy on-off taps or dies I usually go to Tracy Tools first.

I already have a couple of taps in that size.

That would be British Standard Bulb then 😊

Yes I know, I’ve got standard Metric coarse. As I said in my OP I find cutting fine threads in the larger sizes much easier and for my application more than adequate. Now I know 1.0 is not so common I need to get a 1.25 Tap and probably a Die.

Would THESE do from Zoro?
https://www.zoro.co.uk/shop/fasteners/screw-plugs/m10x1-00-mf-skt-plug-screw-din908/p/ZT1086461X

It's worth searching for M10 extra fine, rather than just fine.

See also Taper
https://www.zoro.co.uk/shop/fasteners/screw-plugs/m10x1-00-mf-skt-pipe-plug-din906/p/ZT1086418X 

And Straight Stainless
https://www.zoro.co.uk/shop/fasteners/screw-plugs/m10x1-00-mf-skt-pipe-plug-din906-a2/p/ZT1086425X 

For other larger jobs
https://www.fusionfixings.co.uk/product/search?search=m10+extra+fine 

Bill

Edited By peak4 on 01/01/2023 12:47:27

i just "googled" 10 x 1mm tap and die lots to chose from

Not hard to use a die or screwcut a bit of 10mm bar to M10 x 1, put a slot in the end or mill a square "head" and just screw that into your m10 x 1 hole.

1/8" BSP is a similar overall diameter easy to cut thread and plenty of plugs about in that thread size.

10 out of 10 Martin ! Bernard, in Norfolk 25.4 or 26 would be near enough, just tighten with the 24"stilsons ! Noel.

M10x1 is actually very, very common. Walk outside, and pretty much every car you see will have a couple of dozen of them in the brake and clutch plumbing. Mazda use it for a number of mechanical parts on MX5s - so much so that I bought a tap for modifying them to fit a friend's kitcar project.

Similarly, M12x1.5 has been a common wheel bolt and fuel fitting thread for decades, even though it is considered odd in 'normal' engineering

I had no problems getting hold of M10 x 1 bolts and a tap when we remade the X axis stops on the drill mill. 1mm pitch was chosen because the mill is metric and it would be easy to make engraved dials for fine adjustment.

Yes the taps are easy to find. At least they were when I bought mine. It’s finding the bolts that’s not so easy.

The problem with some suppliers are the shipping costs. Lots of suppliers fail to get my business due to this.

They look nice, but the postage is 2 1/2 times the cost of the bolts. 😉

I've not looked today, but they regularly have good stuff on offer, which can go into stock to get above minimum order for free postage.
Check out imperial silver steel, which is what I ordered last time.
2m lengths were cheaper than 1m ones in some sizes.

Bill