Midyear Jack Parts

[Gerald C.]

I'm looking for the threaded rod and respective "nut" for my 1967 jack. any ideas where I can get any parts?

Jerry

[Dick W.]

Re: Midyear Jack Parts

Gerald, there was a lengthy discussion here some time ago about the rod and nut. It seems that the thread is 1/2"-5 acme. I have not been able to come up with anything coarser than 1/2"-6 acme, and that is somewhat an oddball. Seems that 1/2"-10 is standard. If you are changing the rod and the nut, I would think that you could probably get away with 1/2"-6 thread and no one would ever notice. Here is one source that I found for that rod http://www.roton.com/QS_lead.aspx?line=Quick . Normally I use Fastenal or McMaster Carr for the odd items, but it seems that neither stock 1/2"-5 thread fasteners.

[David L.]

Re: Midyear Jack Parts

I'm looking for the threaded rod and respective "nut" for my 1967 jack. any ideas where I can get any parts?

Jerry

Jerry,
I have several mid-1960's Corvair scissor type jacks (stamped "A" for AUSCO) that are exactly the same as the Corvette jacks (made in the same time period) except for the frame adapter part. If interested, send me a PM and I will check out what I have. As far as I know the threaded rod and "nut" on a 67 Corvette jack is the same as on my original 1966 Corvette jack.
Dave

[Robert G.]

Re: Midyear Jack Parts

I wouldn't recommend using the jack for anything but show. I had the threads pull out of the nut as I was jacking up the car and it was quite the surprise. Luckily the wheel was still on the car.

[David L.]

Re: Midyear Jack Parts

I wouldn't recommend using the jack for anything but show. I had the threads pull out of the nut as I was jacking up the car and it was quite the surprise. Luckily the wheel was still on the car.

You are correct. I have one Corvair scissor jack (Type I) in my "jack collection" where the nut threads are stripped. The threaded rod, however, has no damage.

[David L.]

Re: Midyear Jack Parts

Enclosed are pictures of the threaded rods that I removed from two of my Corvair jacks (both Type I). These two jacks do not have the reinforcement stamping contained on Type II and Type III jacks.

The one with the thrust bearing (removed) measures about 14 5/8" (O.L.). The 3/4" "hex nut" is held in with a pin that measure 0.25" in dia. The other pin measures 0.11". The threaded length of the rod measures about 8 1/2". The frame adapter on this jack is stamped "RH" (for Ryerson & Haynes, the manufacturer) inside a circle on the bottom side. The "RH" stamping is only visible if you lift up the frame adapter as much as you can.

The rod with with the attached "hex nut" measures about 14 3/4" (O.L.).
The pin that holds the "hex nut" measures about 0.19" or so. The thrust bearing and 0.11" dia. pin were missing from this jack. The threaded length of the rod measures about 8 1/2". The frame adapter on this jack has the "A" stamping for Ausco, the manufacturer. This jack is the same as a 63-E65 Corvette Jack (Type I) except for the frame adapter.

The threaded rod in my original 1966 Corvette jack (Type III, with "A" stamping on frame adapter) measures about 13" with a threaded length of about 8 1/2". The pin that holds the "hex nut" measures about 0.19".

It appears that Type I threaded rod can be modified to fit in a Type III jack by simply shortening it to about 13" at the "hex nut" end and drilling out the two appropriate sized pin holes leaving the 8 1/2" threaded length unmodified. The threaded rods measure 0.50" in diameter and have 5 threads per inch.