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

[angusb1]

I have mashed the head of an allen socket head bolt from one of my scope mounts. Annoying but I thought never mind, I'll buy some more. I measured the shank and it's 3.9mm diameter so M4, and the thread pitch is 0.7mm, the standard for M4. The head diameter is 5.4mm though, and the usual head diameter for M4 is 7mm. I have looked for either hex or torx bolts but cannot find any with this narrower head anywhere.

Does anyone know where I might find such a bolt please?

 

[AGR]

I had to explore websites of 2 or 3 ebay suppliers to find some odd sized bolts.
Good luck!

 

[angusb1]

Thanks, I'll look harder on ebay

 

[Tim.243]

I have mashed the head of an allen socket head bolt from one of my scope mounts. Annoying but I thought never mind, I'll buy some more. I measured the shank and it's 3.9mm diameter so M4, and the thread pitch is 0.7mm, the standard for M4. The head diameter is 5.4mm though, and the usual head diameter for M4 is 7mm. I have looked for either hex or torx bolts but cannot find any with this narrower head anywhere.

Does anyone know where I might find such a bolt please?

Get a few more of the larger size, double nut them nice sharp flat file, hold your drill in the vice nip them up in the chuck and take off 1.6mm off.

 

[Sonicdmb73]

Try mountain bike bolts quite often find cap head bolts with non standard heads on bike parts.

 

[bullet chucker]

I'LL have a look at some I have ,Stainless or black? What mounts were your bolts supplied for?

BC.

 

[wytonpjs]

Try Ant Supplies - I’ve been quite surprised by what they carry

 

[weblyish]

You can do a lot with a Dremel or a drill and some sandpaper

 

[Hanechdene]

I have purchased them these people:

Wycombe Nut and Bolt Ltd – Fasteners and Fixings to the Trade and Public

www.wycombenutandbolt.co.uk

 

[takbok]

@angusb1 I can turn some down to the right size for you if you don't have any luck.

 

[Donkey Basher]

I have mashed the head of an allen socket head bolt from one of my scope mounts. Annoying but I thought never mind, I'll buy some more. I measured the shank and it's 3.9mm diameter so M4, and the thread pitch is 0.7mm, the standard for M4. The head diameter is 5.4mm though, and the usual head diameter for M4 is 7mm. I have looked for either hex or torx bolts but cannot find any with this narrower head anywhere.

Does anyone know where I might find such a bolt please?

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.

 

[Tim.243]

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.

I was first
Get a few more of the larger size, double nut them nice sharp flat file, hold your drill in the vice nip them up in the chuck and take off 1.6mm off.

 

[Stalker-of-the-deer]

Accu.com is where i use.

They have everything in metric and imperial.

 

[Rutland lad]

Accu.com is where i use.

They have everything in metric and imperial.

I have used ACCU before. Their postage isn’t cheap but the product is good. I then had a brainwave of buying a few scope mount screws and others ‘just in case’ I lost another one. Great insurance policy. Since then I’ve not lost any !

 

[angusb1]

Thanks everyone. Had a look at accu.co.uk, wycombenutandbolt.co.uk, Ant Supplies and Model Fixings and none of them had what I need on their websites. I was up early this morning so I went out in the garage and turned down some of the A2 stainless bolts that I had bought before I realised the heads on the ones I needed were only 5.4mm and not 6.8mm. I will try those sites in future, they seem like they will have most fixings.

 

[bullet chucker]

Sorry' to big.

BC.

 

[Flash G 74]

Hello, Have you thought of asking the scope mount supplier ??

 

[HonestJohn]

Schultz Larsen slide and lock screws, although torx, are m4 and should fit the bill.

 

[angusb1]

Hello, Have you thought of asking the scope mount supplier ??

Thanks but I don't know who the mount supplier is, I bought the mounts second hand and there are no name markings on them that I can see. Got my bolt heads turned to size now so no problem.

 

[HonestJohn]

Thanks but I don't know who the mount supplier is, I bought the mounts second hand and there are no name markings on them that I can see. Got my bolt heads turned to size now so no problem.

Can you list a picture?