I have an electric fencer that is blowing fuses.
The fencer is held together with one inch long screws that have heads on them much like a watch stem.
This is the first time I have run across this type of screw and have no idea what its called or where to buy the specialty tool that will remove them.
It will probably be some kind of nut driver.
Anyone know what its called???
What the Og is an “electric fencer”?
I just did a google search. Apparently it’s a battery powered gadget used to electrify an electric fence. You’d think it would be called something like “fence electrifier”. “Electric Fencer” sounds like a robotic opponent for someone practicing sword fighting. 
Let’s get picky. A watch stem has multiple shallow ridges, not unlike the outside of a U.S. quarter, that are designed for fingers to grip. I doubt there is a tool for that.
If there are six flutes, it’s likely a torx screw. While most of the info in Ringo’s links is about screw head shape rather than type of tool used, the bottom illustration in his second link shows a torx screw. It happens to be an internal torx, but there are external torx fasteners, which are more like my perception of “like a watch stem.”
If there are twelve flutes, I would expect it’s a double hex screw. A twelve point socket or box end wrench would be the tool. To visualize, align two hexagons atop each other so that the points of one are centered along the flat sides of the other–that’s the double hex. Twelve-point wrenches are readily available.
If those answers don’t help, I would need a more precise description of what you’re looking at. Any actual dimensions of the screw could also be helpful.
when a product uses a closure which NOBODY has the required tool to open, there is USUALLY a good reason - this thing may have some really nasty high-tension coils in it. possibly fatal. DON’T MESS usless you are DAMN sure you know exaxct what is in there
No its not a torx or a double hex.
Unless someone has experience with high voltage the enclosure should no be opened.
“Don’t try this yourself folks”
I’ve worked with high voltage before and I’m just looking for a blown diode.
The screw head is .250 and has 22 tits or the same number of grooves.
It is like a very small thumb screw but it is in a recessed area so you cannot reach it.
any other ideas???
give us the name of the manufacturer so we can see if there is a diagram of it somewhere, please. Model #?
needlenose pliers
dykes (uses as pliers)
o-ring pliers
e-z out/left-handed drill bit (assuming it’s a std SAE or matric thread, who care what happens to the screw head?)
uh, you do have linesman’s gloves, right?
still, I WOULDN’T GO THERE (and I have stuff here that would scare the hell out of a LOT of people)
needlenose pliers
dykes (uses as pliers)
o-ring pliers
e-z out/left-handed drill bit (assuming it’s a std SAE or matric thread, who care what happens to the screw head?)
uh, you do have linesman’s gloves, right?
still, I WOULDN’T GO THERE (and I have stuff here that would scare the hell out of a LOT of people)
Huskee
Solid state Electric Fencer
Model No. 36-04308
I thought about dykes but there isin’t enough room.Needle nose that are small enough don’t have the strenth.
If I can’t find enough info I’ll probably use a dremmel and grind a groove for a straight screwdriver.
I’d still like to know what you call that type of screw.
thanks