Multifix A clamp screws

[YouraTParticipant @yourat]

Hi all.

Does anyone know what the clamp screw type on real Multifix size A tool holders is?

As best as I can tell, they are M7x1, can anyone confirm?

Also, if this is the case, where on earth can I but three square headed clamp screws for one…? Even the Swiss seem to be out of stock…

Thanks!

[YouraTParticipant @yourat]

[DC31kParticipant @dc31k]

See:

Square head screw M7x1x22 for system size A

[BazParticipant @baz89810]

The ones on my genuine Multifix are M7x1, don’t know where you buy screws but Tracy Tools will sell you a tap and die if you need one.

[YouraTParticipant @yourat]

Posted by DC31k on 24/09/2023 18:06:22:

See:

Square head screw M7x1x22 for system size A

Oh – thanks – useful!

€9 for three screws – €31 shipping from Germany though <arghhhh>

[Nigel Graham 2Participant @nigelgraham2]

The Tracy Tools chart that lives by my PC, tells us M7 X 1 is a standard ISO-Metric Coarse thread.

[YouraTParticipant @yourat]

Posted by Nigel Graham 2 on 24/09/2023 18:20:56:

The Tracy Tools chart that lives by my PC, tells us M7 X 1 is a standard ISO-Metric Coarse thread.

Yes, and that's fine generally – I can buy some hex head or cap head bolts no problem, just wanted the square head on this occasion – I'll perhaps have to make some this time!

[FulmenParticipant @fulmen]

My knockoffs are M7x1 as well. I believe it's a "2nd choice" thread, you won't find anything other than 1st choice in normal supply.

Mine are fairly soft, I suspect it's done to prevent people from stripping the threads on the holder. I've worn out several, but they're easy enough to make.

[YouraTParticipant @yourat]

Posted by Fulmen on 24/09/2023 18:27:51:

Mine are fairly soft, I suspect it's done to prevent people from stripping the threads on the holder. I've worn out several, but they're easy enough to make.

Yes, that makes sense – I think I'll be making some given the shipping cost from PeWe.

[FulmenParticipant @fulmen]

Don't forget to turn it down a bit on the end. The screw tip tend to deform when over-tightening, this is probably what causes them to bind and strip in the end.

[David LindquistParticipant @davidlindquist71920]

The screws on my "A" series holders from SRW Amestra are M7x1 also. I bought an M7x1 die to make my own screws using 5/16 inch square 12L14 (a leaded steel here in the US). This was made easier by the fact that I already had a 5/16 inch square 5C collet. The 5/16 inch square is very close in size to the heads on the original screws; the Tee-handle wrench fits fine.

Depending on the size of the tool I find the stock screws are sometimes a bit long and like to make shorter ones in these cases.

David

[Mark RandParticipant @markrand96270]

Same thread as peugeot 405 brake caliper bleed screws. Don't ask me how I foud out .

I have some spares from PeWe because I ordered them when I needed a few new toolholders to replace some of the 1952 originals…

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