Clutch head screw source????

[Donald H.]

I was trying to install the hood support on my 1960 and the clutch head screws that come in the regular corvette suppliers kits are not long enough. They are 1/4" x 20 screws and the ones in the kits are 3/4" and I need some that are at least 1". I'm going to contact the regular suppliers and see if they have any that are longer. I searched their web catalogs, but the only one that lists sizes is Paragon.

I've searched the web, but found nothing.

Thanks,

Don

[John F.]

Re: Clutch head screw source????

Don, Is this what you are looking for? They are 3/4" long. Send me a PM.

[Bruce B.]

Re: Clutch head screw source????

Check in the DriveLine mag: Richard Fortier sell them and many other fasteners.
He probably supplies Paragon, Central and others with the fasteners.

[Donald H.]

Re: Clutch head screw source????

Don, Is this what you are looking for? They are 3/4" long. Send me a PM.

PM sent. However, I already have some 3/4" ones. I need something longer.

Don

[Donald H.]

Re: Clutch head screw source????

Check in the DriveLine mag: Richard Fortier sell them and many other fasteners.
He probably supplies Paragon, Central and others with the fasteners.

Good suggestion. I just sent him an Email. I also asked if he has the bolts I need for the two threaded holes in my intake (another thread)

Thanks,

Don

[John F.]

Re: Clutch head screw source????

Don, I would just lightly grind/file down the the fiberglass on the underside and use the 3/4" screw.

[Mike E.]

Re: Clutch head screw source????

I don't think it would be a good idea to grind down glass. You have, from top to bottom: clutch head of bolt, washer, fiberglass, lower bracket for hood brace, metal support riveted to inner fender, washer, and nut. Grinding fiberglass won't move the metal brace. Find the right length bolt.

[Donald H.]

Re: Clutch head screw source????

Mike is correct. The base of hood support is sandwiched between the glass of the fender and the metal bracket that is riveted to the fender. Grinding the underside of the glass would make the gap larger but not solve the problem.

[Mike M.]

Re: Clutch head screw source????

try Restoration Supply in windburn, pa. They are online. good folks to deal with, reasonable and almost always have the fasteners i'm searching for( and believe me, a 31 chevy cabriolet has a bunch of weird fasteners). mike

[Donald H.]

Re: Clutch head screw source????

try Restoration Supply in windburn, pa. They are online. good folks to deal with, reasonable and almost always have the fasteners i'm searching for( and believe me, a 31 chevy cabriolet has a bunch of weird fasteners). mike

Thanks Mike. They don't show any longer ones in their catalog, but I'll check with them for sure.

Don

[Philip P.]

Re: Clutch head screw source????

Don, I measured the ones in my car they are 1 1/16 inch from the top of the head to the tip. I did not remove them but there seems to be about 1/8 inch of thread sticking out from the nut. The ones on my car are close to 3/4 inch on the thread anyway. I will be interesting where you do find them as there is someone out there making them. I looked at Danchuck and a few others but could not find any that are 1 inch. Serveral places ie McMaster-Car Fastenal sell the tool but no fastners.
Phil

[Donald H.]

Re: Clutch head screw source????

Don, I measured the ones in my car they are 1 1/16 inch from the top of the head to the tip. I did not remove them but there seems to be about 1/8 inch of thread sticking out from the nut. The ones on my car are close to 3/4 inch on the thread anyway. I will be interesting where you do find them as there is someone out there making them. I looked at Danchuck and a few others but could not find any that are 1 inch. Serveral places ie McMaster-Car Fastenal sell the tool but no fastners.
Phil

I Need at least 1 1/8" of thread. I got a response from Paragon and they said all they have are the 3/4" long screws. He said the supply he has is the last he will get. Said that the company that makes them will no longer be making clutch headed screws.

How's this for a solution (see picture)? I cut the end of the clutch head screw and an appropriate length of another 1/4"x20 screw. Chamfered the ends and will weld it together. Grind it a little so it will fit through the hole in the fiberglass hood support, and bracket underneath. The hood and hood support are supported by the bracket underneath, so there is not a lot of shear stress on the screw.

Don


clutch head screw.jpg

[Philip P.]

Re: Clutch head screw source????

Interesting solution looks to me like it will work. Having a little time I measured the screw, it is indeed 1 inch (thread length). When installed I have at least 1/8 to 1/4 inch beyond the nut it looks like the 3/4 inch should work. Could there be something else in the way that the bracket and mount are going together.
just a thought.
Phil

[Donald H.]

Re: Clutch head screw source????

I really think it is due to the replacement of the front panels. I think the glass is just thicker and thus the bracket had to be riveted a little lower to allow the support to fit.

Thanks,

Don

[John H.]

Re: Clutch head screw source????

Don, I measured the ones in my car they are 1 1/16 inch from the top of the head to the tip.

Phil -

The industry standard for measuring bolts/screws is from the bottom of the head to the tip, also known as the UHL (under-head length).