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i need a socket/driver that fits this bolt head

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TwoInch

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Mar 29, 2012
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closest thing i can find are these. dont know what they are for, and i doubt there is a socket for it.

is your bolt threaded onto that piece or does it have a nut on the other end?

i have to imagine you are supposed to hold it with an open end wrench and turn a nut on the other end.

oval-bolt-407.jpg
 
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larry_g

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oregon
You can deform a small tube into an oval shape to fit that.

lg
no neat sig line
 

Jagmandave

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Overland Park, Ks.
Citroens use those in quite a few places too......We used to heat up a 1/4" socket and form it over the head of one, it always worked....
 
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92GreenYJ

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San Diego, CA
there are a million tools that will grab it and hold it.

im thinking he wants to turn it, and thats why he is asking for a socket type tool.

Yeah but he should be able to turn it enough with an adjustable wrench to get it to the point he can finger spin it out
 

Provincial

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Sep 21, 2011
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Near Salem, OR
Your photo rang a bell for me and I dug into my collection looking for a socket I remembered. I found two sockets that have the oval opening. One is a 3/8" drive Hinsdale SJ-8-C with an opening that measures .258x.203. The other is a 1/4" drive Plomb 4705 with an opening that measures .232x.171.

On page 2 of the Plomb #15A catalog it shows the 4705 for use on oval headed screws of Trico wiper motors. This reminded me of rebuilding a Model A Ford wiper motor almost 50 years ago and using pliers to turn the screws. I knew that I had experienced screw heads like that before! :)
 

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ChevyEFI

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It looks to be longer in relation to the width than a typical shock double-D or the above Plomb / Hinsdale bits. On the other hand, they may work like a champ.
 
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C

comedyman809

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Smithtown, NY-thats in suffolk county long island.
well it is on an electric motor that is out of a centrifuge for laboratories its all metric, the threads go into the black housing, no nut, and with an adjustable, it just wouldnt budge because you cant get any clearance. i fit a 6 mm deep 1/4 drive socket and it just fit enough for me to turn it out, and then back on, it is a german product, and a lot of these machines use oem spec so techs like me have a hard time servicing there equipment.
either way i still service them, rebuild there "unrepairable" motors, and such, just would like the correct tool to take off that bolt, i wonder if they even had that bolt made for them just so only they can remove it. maybe it looks discouraging, and im supposed to pay the 1000 to replaCE THE MOTOR instead of replacing the 15 dollar ball bearings.
 

devoncoolman

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Mar 17, 2013
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quakertown pa
That is a snap-head bolt. It has a 8mm head that snaps off when the fastener is torqued. It is used for quick assembly and to prevent removal later on. I use a chisle or if u can get on it a turbo socket. Then either get new snaphead bolts or just put allen head fasteners in there. That answer ur ?.
 

monkeyspanners

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May 28, 2013
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Oxford, UK
I'd probably try making something to fit. Maybe a high tensile bolt the diameter of the round part with a suitably sized slot ground in it. Maybe put cap head screw back in if its not an odd thread.
 

Super Mech

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Feb 19, 2011
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Bronx,NY
Could be a snap head/tamper proof type bolt. Depending on the size of the thread why not cut a slot in it with a Dremel and use a screwdriver?
 
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