globestar
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Post by globestar on Feb 9, 2014 17:39:49 GMT -8
I've never seen crazy "bat shaped" screws like these. What are they called and where can I find a bit to remove them?? Thanks in advance! Mike   |
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Ten
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70 Shasta 16SC + 1964 Airflyte
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Post by Ten on Feb 9, 2014 17:50:17 GMT -8
I believe they are called "clutch drive" screws. They are made in a couple sizes, and there are bits that fit them. I would think they would be easily found at Harbor Freight, or a reputable hardware store also.
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Post by universalexports on Feb 9, 2014 17:51:23 GMT -8
looks like some type of security bit, you can buy security bit sets, I think what will work is finding a flat head screw driver that will just fit in the hold diagonally (in the longest possible opening) it will have plenty of meat to grab onto on each end of the blade tip and come out. place properly sized flat tip screwdriver in screw as pictured and turn counter clock wise, it will have metal on each side of the bit where it is needed to twist it.  |
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globestar
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Post by globestar on Feb 9, 2014 18:54:35 GMT -8
You're both right on the money, it would have taken me forever to find that without your help, thank you!!
Wikipedia: There are two types of clutch screw drives: type A and type G. Type A, also known as a standard clutch resembles a bow tie. These were common in GM automobiles, trucks and buses of the 1940s and 1950s. Type G resembles a butterfly. This type of screw head is commonly used in the manufacture of mobile homes and recreational vehicles.[citation needed] Type G is not necessarily tamper resistant because type G can be removed with a Flathead screwdriver.
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Post by bigbill on Feb 9, 2014 19:20:51 GMT -8
The clutch head screw was originally designed to be a fast dependable screw that could be installed with a power driver on an assembly line.
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slider
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Post by slider on Feb 9, 2014 20:15:33 GMT -8
Yep, clutch bit G. McMaster Carr has several sizes of them, Mine are 5/16 and I have about 10,000 more to remove. The problem I'm having is that the heads are rusted and bit won't get deep enough.
Best luck I've had so far is filing down a square bit into a thick flathead. Also getting them started with a manual screwdriver before trying the cordless has worked better.
Definitely won't be going back with them once I get em all out.
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pirateslife
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1969 Shasta Compact
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Post by pirateslife on Feb 9, 2014 20:37:01 GMT -8
Yep, clutch bit G. McMaster Carr has several sizes of them, Mine are 5/16 and I have about 10,000 more to remove. The problem I'm having is that the heads are rusted and bit won't get deep enough. Best luck I've had so far is filing down a square bit into a thick flathead. Also getting them started with a manual screwdriver before trying the cordless has worked better. Definitely won't be going back with them once I get em all out. you know you wanna keep it original.....lol |
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txoil
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Post by txoil on Feb 9, 2014 20:42:42 GMT -8
I went thru this on my restoration. STOP!!! Go to a hardware store, buy a screw removal tool set (two sizes) that chucks into your drill and you rotate it backwards and it takes them right out. I went thru hell before I found the damaged screw removal tool. WELL worth $10.00.
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slider
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Post by slider on Feb 9, 2014 20:54:47 GMT -8
If I ever was these would make anyone change their mind, I'm sure they were awesome when new  . Will try screw removal tool, also read impact driver (kind you hit with a hammer) works, but will try screw removal tool first. |
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57heaven
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Post by 57heaven on Jun 4, 2020 11:30:34 GMT -8
Does anyone know where to buy these clutch head screws preferably in stainless? My 57 Pathfinder uses them on the exterior and I would like to replace some of them when I take the windows out. Would prefer to go with the same style if possible.
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ekimnamniets
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Post by ekimnamniets on Jun 4, 2020 17:42:58 GMT -8
McMaster-Carr. Hardware from hell! I've never needed anything hardware wise that they don't have.
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57 Trotwood
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Post by 57 Trotwood on Jun 5, 2020 6:15:04 GMT -8
The best way to remove these screws is to drive them in ever so slightly then reverse them out. This way you are shocking the the material around the screw. I do the same thing when working on machinery when the nut is locked.
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Post by Teachndad on Jun 6, 2020 20:32:55 GMT -8
Lots of different opinions on this one.
I just bought a 3 head clutch head socket set off of Amazon, I think. Worked great because I could get deep into the clutch head with the socket attached to a ratchet. I used it on my Hehr front window assembly restoration.
In this hobby, there are plenty of work arounds, but I have found the right tool for the job makes a big difference. I payed a little extra, but in the end, I was happy I did.
Cheers,
Rod
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57heaven
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Post by 57heaven on Jun 7, 2020 13:10:46 GMT -8
Still looking for the clutch head screws if any one has any ideas
No go at McMaster Carr
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nccamper
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Post by nccamper on Jun 7, 2020 14:00:55 GMT -8
My usual sources don't carry them. You can find them on ebay but the prices are unreasonably high.
Maybe something similar might work? |
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