I am missing the two devices that hold the cover against the firewall inside my early 71. There are threaded holes but nothing to screw into them. I wonder what threads these are? One behind each seat. Thanks Bill
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Seat belt mounts? http://www.panteraplace.com/page6.html
[This message has been edited by www.PanteraPlace.com (edited 06-13-2004).]
[This message has been edited by www.PanteraPlace.com (edited 06-13-2004).]
Good call! It is hard to tell when parts are missing. I have a leftover 5 point harness that I cut to make the sholder straps out of. My car came to me with Lakewood style lap belts.Now these fit right into the race style latch for a nice 3 point. Now if I only knew the thread size? I guess I could go to the local hardware store and let thm try some bolt threads.
After using my dial calipers and thread pitch gages which only cover American National Threads, I can tell you that the thread is NOT a 'National Fine'. After searching through the 'Machinery's Handbook the only thread that comes CLOSE is the 10mm(Dia.) X 1.5 Pitch. Although I suspect this is a 'Special' Bolt that is marked(on the head) "klippan 8.8". The dial caliper measures the Major Thread Diameter at just under 11 mm, at .428" the tap for this thread has a max. diameter of .410". Is this intentional in design so the bolt will thread 'in' tight to its' maximum root depth? Your guess is as good as mine! After all, it is ment to secure a shoulder harness/seatbelt, during a collision. Marlin. O.K. Here's the bummer; I remembered I had a set of metric taps, so I compared them with the original mounting bolt. This Bolt thread is FINER than 1.5 mm Pitch, AND it is COURSER than 1.0 mm Pitch, it would have to be a 1.25 Pitch! There is NO such animal in the Machinery's Handbook! The ONLY pitch for 10mm is 1.5, the ONLY bolt having a 1.25 Pitch is 8mm in Diameter. So there you have it! It has to be a specially machined item.
[This message has been edited by MARLIN JACK (edited 06-13-2004).]
[This message has been edited by MARLIN JACK (edited 06-13-2004).]
... 10mm X 1.25 Pitch was found elsewhere under 'International and Special Sizes', so it does exist! I think this is what you are looking for, expect it to screw-in 'Tightly'! Good-Luck with it! Marlin.
You are probably looking at a 7/16-20 or 11mm X 1.25mm pitch.
Jim! You are Very Very Close!! I tried a 7/16- 20 Bolt into the threaded hole. It jams upon starting. The thread gage fits, almost, but NOT perfectly. I personally have NOT seen a listing for a 11mm Bolt, have you? We All Thank-You for your imput! Marlin.
7/16 X 20 works fine. The 10x 1.25 fell in. I love this site! Thanks y'all
The 11mm X 1.25 discussion has come up a couple of times on the deTomaso list. I never found any listing of an 11mm. I came to believe in the 11mm when I had to use a metric wrench to take 3 of the bolts out of my half shafts. (The rest were 7/16-20)
Major diameter of an 11mm falls right in the middle of the range for 7/16. The thread charts list 7/16 as 0.4281" to 0.4362", 11mm would be 0.4331". 1.25mm pitch is 20.25 threads per inch.
Think you could tell the difference without a comparator?
Major diameter of an 11mm falls right in the middle of the range for 7/16. The thread charts list 7/16 as 0.4281" to 0.4362", 11mm would be 0.4331". 1.25mm pitch is 20.25 threads per inch.
Think you could tell the difference without a comparator?
11x 1.25 metric is indeed a reality. Both the seal belt bolts and the shoulder harness bolts are so threaded. Brutalizing a tap or an SAE bolt thru the welded hole also works- if the tack-welds don't break during the exercise!. Interestingly, the identical thread is included in my Sears tap & die set, and I just finished using both the tap and the die for a mod involving Yamaha motorcycle banjo fittings for a brake line.