Source for M6 caliper bolts with T25 head?

[RebornRider]

Magura owners know that Magura loves their T25 driver. I'm looking for replacement caliper bolts (M6-1.0 x 25mm long) with a T25 Torx head. It appears the industry standard for the M6 size is T30, so none of the industrial supply places in the US (that I've checked) have an M6 with a T25 head. I have also had zero success finding a US source for Magura bolts, which do take a T25 driver.

TLDR: Do you have a source for M6-1.0 x 25mm long bolts that take a T25 driver?

 

[RebornRider]

is There a need to stick with T25? So long as you have M6x25 it’ll work. I’d just order titanium ones.

I don't want to carry a T30 that is only needed for the caliper bolts. My current bolts are 4mm hex. The bike shop mechanic that did the "overfill bleed" I posted about assumed they were torx and used a T25. That screwed up the head enough that a 4mm hex key won't fit and a T25 is sloppy. So I want to replace the bolts. I have more 4mm hex head bolts, but I like the idea of needing only a T25 for all the brake hardware.

 

[Aussie78]

I don't want to carry a T30 that is only needed for the caliper bolts. My current bolts are 4mm hex. The bike shop mechanic that did the "overfill bleed" I posted about assumed they were torx and used a T25. That screwed up the head enough that a 4mm hex key won't fit and a T25 is sloppy. So I want to replace the bolts. I have more 4mm hex head bolts, but I like the idea of needing only a T25 for all the brake hardware.

Totally justified in your personal desire to want to standardise. The quality of paid workmanship is a challenge world wide. Preventing scenarios that allow errors to happen is always a good move.

The MTB industry is the cause of the problem here. The industrial standard hardware with torx heads is specifically T30 on an m6 fastener for a reason, that being that the T25 tool to bolt interface is outside of its reliable torque range. The MTB world, in its desire to seek extra revenue from being unique, and trying to save a minuscule amount of weight, have downsized the bolt heads and dropped down to T25.


EBay and Aliexpress have m6 bolts with T25. Titanium too. Use thread anti seize if going Ti