Just got the SRAM Quickview mount, didn't know that it uses torx t25 bolt, don't have the neccessary tool to tighten it. Can i use flathead screwdriver ?

While not ideal, if you can use a flathead screwdriver with out making a mess of the bolt head then go for it until you can substitute the proper tool. The mount is not something that requires a lot of torque to ensure it is installed properly, it only needs to be tight enough to support the computer you are putting on it as well as handle road vibration/bumps.

-j

For light torque loads an allen wrench can be used.
Just find one that fits snug enough.
Allen wrenches are more often had at hand or found/bought.

A T25 tool is a necessary for MTB's and will be for road bikes with discs, as it is used for the bots on a 6 bolt rotor to hub, also if you get any Crank Bros parts, alot of them use T25 bolts, may was well get one now, as you will probably need it in the future. Also no point in damaging a new part by using the wrong tool.

Try to find the right tool. A screwdriver can be used if the bolt doesn't have to be tightened very firmly but you need the correct tool to do it right. Torx bits are now common and you should be able to find them in Malaysia also.

As jimc101 mentioned Torx bolts are appearing on more and more bike parts. The chainring bolts on my new Shimano 105 crank (FC-5700) require a T30 bit so their use is increasing.

It is ALWAYS best to use the right tool. That way bolts etc do not end up being ruined and usually have to be drilled out. At hardware stores you can buy single torx bits that fit in hex drivers, or at the very least use an wrench on the hex portion of the bit.

Get the right tool, they are readily available and then you will not be posting on the forum asking how to remove the damaged fastener or where to get another one after it falls out.

Since I acquired my BMW in the '90s there's been a set of Torq drivers in my toolchest. Auto parts & hardware stores carry them, they are pretty standard tools now. Personally, I wouldn't mess around with screwdrivers, etc.

You can also replace the bolt with a stainless allen head bolt from the hardware. Its an option

Just get one..

back side of BB7 t 25 is easier to turn with a Torx L wrench. [+ install the disc]

auto parts shop will have it as well as the LBS..

It is not up to me to spend your money, but screwdrivers are readily available and only cost about $4. Or, somebody you know may already have a screwdriver or multitool you can borrow. Life is just a lot easier when you have the right tools.

Most bike multi tools seem to have that bit built in, check yours before wrecking the head.

If not, head off to Home Depot or Sears or something and get a little set - they're cheap.

Guys, the OP is in Malaysia. I don't think there is a Home Depot or Sears in every town. I do hope he has a decently equipped hardware store of some type within a reasonable distance.

On the one occasion of facing a torx bolt without a proper wrench, I had the helper hold a small screwdrive in the hole and then used a 50W iron to dribble the hole full of common solder. After a moment to harden, I was able to tighten it enough to get to the shop. Then just a bit of wobble, it pulled out without incidence.

I did say "or something"

You have a higher propensity of finding a shade-tree mechanic in SE Asia working on little motorcycles, one of them is likely to have what you need too.

as i said, a snug fitting allen wrench works quite well in torx for moderate torques.
that can be or something. :-)
i was a diesel mech for 40 years

far too many threads on this board become train wreaks/dog piles... lol

Hah, good thinking.