Where to buy M4x12mm socket head bolts with 5.5mm diameter head?

Can you list a picture?
No markings of any kind on the rings. Here they are held on to the rifle with my new stainless screws which I turned the heads of this morning. They still need to be torqued up. Might get the black permanent marker out before I do that. Everything else on the rifle is black so...

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Please excuse the following observation as it's not a criticism of you but rather the ring manufacturer: I don't like the following lock-up detail:
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K
Indeed, they are not the highest quality rings. I wanted to use these which I had on my TAC A1 but sadly they put the scope too high for the max adjustment on my cheek riser without it impeding the full retraction of the bolt, and I think there was another issue with them as well but I can't remember what it was. These A.R.M.S. 34mm rock solid beauties are for sale if anyone is interested.

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What mill is that Tim?
An old Belgium machine I have been using since I was 14! Friction collets, the vice is quite good and I made that 90/45 angle piece when I was 17 as part of my apprenticeship. The lathe Dad bought 2 years previous and I had to use a stick to press the on/off switch lol
 
An old Belgium machine I have been using since I was 14! Friction collets, the vice is quite good and I made that 90/45 angle piece when I was 17 as part of my apprenticeship. The lathe Dad bought 2 years previous and I had to use a stick to press the on/off switch lol

The tilting fixture is very handy I bet. I'm just getting bits and pieces together, a small lathe, a mill, and I got a nice old Cunliffe and Croome dividing head for not much off eBay last year. I had the lathe set up to do something else hence wanting to just buy some bolts but it won't take long to set it up again and it turned those bolt heads nicely.
 
The tilting fixture is very handy I bet. I'm just getting bits and pieces together, a small lathe, a mill, and I got a nice old Cunliffe and Croome dividing head for not much off eBay last year. I had the lathe set up to do something else hence wanting to just buy some bolts but it won't take long to set it up again and it turned those bolt heads nicely.
It is a 3 axis compound vice, an apprentice piece which one the chap I brought it off at a boot sale for £20.00 I gave it to a friend who has a fixture for drilling out "nipples" for BP guns. I borrow it back when needed.
The mill earns it's keep.
EN16 Shaft for a screener, I was remembering as an apprentice I had to stop work at 9.30 take the orders for the rolls buy the tea/coffee/sugar/milk
Go back get the rolls then get moaned at as the lady would forget something (no pickle) lol
 
I’ve used a company called Model Fixings to find small machine screws in the past, have a look at their website.

Alternatively, buy the ones with the larger diameter head, stick them in a drill chuck, file the head diameter down then heat them to orange & quench in oil to colour up.
Yeah, OK, you were first… in my defence it was an early start for me & my 6th on the trot, I’m a bit tired 🥱 💤
 
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