What Is This Screw Driver

[rameez]

Guys,

Can anyone tell me the name of the screwdriver used to open the below nut type.

[Elvis_Pil]

Maybe a modified Allen/Hex key

[terrabytetango]

Looks like a slotted tamper proof screw.

[rameez]

Looks like a slotted tamper proof screw.

machang this is in the distributor of my car..........and i am going to get a closer look tommorrow....there should be a proper screw for this.

[VVTi]

maybe its something you should not be considering mucking about with?

[jdnet]

wait didn't you just blow a head gasket trying to DYI a radiator fix? Now you want to work on the carb?

[toosea]

Me thinks it could be a rivet?

[rameez]

wait didn't you just blow a head gasket trying to DYI a radiator fix? Now you want to work on the carb?

no the head gasket was not blown of because of me , it was because of the leak in the radiator hose,this is in my distributor,was wondering why the nut looked like it.My mechanic was easily adjusting the advance and retard positions but i could not see how it was been done,since he is away and will not be back till the weekend i was just looking how he did it...do you know what it is.

[rameez]

maybe its something you should not be considering mucking about with?

curiosity kills the cat

anyone advancing and retarding are done by mechanics.......right.i have not touched it still

[Anjo]

Looks like a slotted tamper proof screw.

This does seem to be a tamper proof screw.I doubt there is a tool available that can remove it. Because of the shape, you can only turn it clock-wise (tighten) turning it the other way would make the screw-driver slip.

The only way I see is to cut a groove across using a hacksaw blade and use a regular flat screw-driver.

[Sifaan]

This does seem to be a tamper proof screw.I doubt there is a tool available that can remove it. Because of the shape, you can only turn it clock-wise (tighten) turning it the other way would make the screw-driver slip.

The only way I see is to cut a groove across using a hacksaw blade and use a regular flat screw-driver.

stumbled on the answer by accident - it's a one way screw. As Anjo says, you can tighten it (even with a flat screwdriver) but you can't remove it

[Scooter]

A "funny" scredriver called a "Un-Do-It" does the trick. See

http://www.tamperproof.com/categories/one-way-slotted.html

Doubt if you'd want to buy one for the toolbox but the pic give an idea of how to grind down a couple of pegs on the blade of an old driver if one was really desperate with a stuck one in an inaccessible spot. If you do get the screw out of the distributor fixing at some time, an allen head replacement could be the way to go.