Partial Set Of Hex Head Splines??

[dimwittedmoose51]

This came in the weekend stash and I grabbed them since I had never seen anything like them before.  The hex heads appear to be the same size as if they were the driving mechanism, but the splines ends are all different sizes and spline counts.  Anyone ever seen stuff like this?  The longest one is maybe an inch long.  I doubt they are collectible, but wondered if they were a "one-time use" driver for a kit project, or have a use somewhere in this world.

TIA


DM&FS

[Bus]

They may be "Easy-Outs" for pipe nipples. Check to see if they will fit inside pipes.

[dimwittedmoose51]

Good idea, but those two small ones would be for like 1/4" and smaller pipe.  I see the application however.  They've definitely bee used though.....

Thanks

DM&FS

[lzenglish]

If they were pipe or tube easy outs, or extractors, I would think they would be tapered, or offset. The first thing that comes to my mind is a torx bit of some sort?

Wayne

[rusty]

The closest thing I have seen to those is the door hinge removal kit (automotive), it has a set of hex head spline adaptors, and a ratchet, short adaptors allow it to fit in the door hinge space ...

[Papaw]

The spline screw drive has twelve splines in the fastener and tool. Spline drives are sized via numbers. Its primary advantage is its ability to resist camming out, therefore it is used in high-torque applications, such as tamper-proof lug nuts. It is named after its resemblance to a spline used on shafting to transmit power

Time to repost Wikipedia's page on drive types-
http://en.wikipedia.org/wiki/List_of_screw_drives

Other makers have both internal and external spline drive tools for things like this-

[dimwittedmoose51]

Another theory!!!  I have a Mac "triple square bit(8mm?)with 12 points that is used for German car CV joints cap screws(the older allen heads would strip out when removed incorrectly) and have seen them go even larger and I had to special purchase a "torx plus" bit for the rocker arm assemblies on our Subaru Outback.  It's slightly different than regular torx. 

I mis-spoke earlier, the hex heads on the bits in question are of different size relative to their shaft diameter.  Let's all sleep on it and see what shakes in the morning!!

DM&FS

[dimwittedmoose51]

I think the old 911 Porsche had some crazy head bolt pattern with like 7 sides on it, but that was to keep goober mechanics from screwing with German "perfection".  Ya nevva  know......

DM&FS

[rusty]

The porche rear end has some spline bolts, but you can get tools for those. There is also a weird not-available-will-never-be-available bolt type used for  the caliper internal housing so idiots don't disassemble the internal caliper parts doing brake jobs. (You can't possiblly reassemble it without factory special alignment jig)

[Papaw]

Rusty, how about one of the old British motorcylce "sprung" hubs? Never, ever try to dissassemble one, it is very dangerous!

[rusty]

The secret to success as a mechanic is not learning what to fix,
 it's learning what NOT to fix.

Do not fix the spring bolt in a belt tensioner.
Do not fix gas-shocks.
Do not fix self contained struts, at least, not without spring tools
Do not remove the pin from the hood hinge on a 32 ford....
Do not ever,ever, fold up that little sheet metal tab on the Chrysler ignition switch
Never let the smoke out, it is very hard to put back in...

[dimwittedmoose51]

There's at least a few Daily Quotes in there somewhere!!!  lol

DM&FS