dibarlaw Posted June 4 Share Posted June 4 This is what I responded to Lou who has another thread about his 1923-35. Lou: Received the gland nuts yesterday. Yes, they are pretty rough. I will also work the Buick Forum for some more accurate sizes. Overall threaded diameter I read as 1.367 at 16 threads per inch. LH and RH. The hex I believe is to be 1.125. I can do this but the fit of the finished part is only speculative since I do not have a pump body to check the fit. We shall see. 1 Link to comment Share on other sites More sharing options...
Old26Buick Posted June 5 Share Posted June 5 Would they be the same as a 26 standard ? I have a few Link to comment Share on other sites More sharing options...
Leif Holmberg Posted June 5 Share Posted June 5 Not the same as 1923. Link to comment Share on other sites More sharing options...
dibarlaw Posted June 5 Author Share Posted June 5 Interesting that I tried them for fit into the female thread packing nuts of my 1925 Master pump. They start nicely but feel like they are a tapered pipe thread. Link to comment Share on other sites More sharing options...
Leif Holmberg Posted June 6 Share Posted June 6 How about a picture of your 1925 master pump Larry,I`m confused? 1 Link to comment Share on other sites More sharing options...
dibarlaw Posted June 6 Author Share Posted June 6 Leif: The Packing nuts are the same for both the Standard and Master in 1925. Our 1925 Standard set up. The 1925 Master set up. I have a spare Master pump apart and just thought that I would check the fit of the threads since they both are to be 16 TPI. 1 Link to comment Share on other sites More sharing options...
Leif Holmberg Posted June 6 Share Posted June 6 Thanks Larry.Now i understand what you meen when I see the last picture. 2 Link to comment Share on other sites More sharing options...
nat Posted June 7 Share Posted June 7 On 6/5/2024 at 11:20 AM, dibarlaw said: They start nicely but feel like they are a tapered pipe thread. Packing nuts would not use a tapered thread. The internal threads are apt to be full of muck and old packing. The thread is probably 1 3/8"-16 and a 1 1/8" hex would be an iota smaller than the minor diameter if the male threads. The inside diameter of the female 1 3/8"-16 thread would measure gosh darn close to 1 5/16". A tool for cleaning internal threads can be made by bending a, ( 3/32"-1/8"?), wire into a "U" and filing the ends to a 60 degree point. I couldn't find a good image of such a tool so please excuse the crude sketch. 3 Link to comment Share on other sites More sharing options...
dibarlaw Posted June 7 Author Share Posted June 7 (edited) Both of my internal 1925 and external 1923 threads were well cleaned. My photos do indicate how stressed and damaged the external 1923 set was. Leif sent me 3 photos of his 1923-1924 4-cylinder packing nuts threading nicely into his 1925 female packing nuts. So now I know that I can use mine for a thread gage when making new ones. Edited June 8 by dibarlaw spelling (see edit history) Link to comment Share on other sites More sharing options...
Lou McCarrell Posted June 9 Share Posted June 9 Larry, those nuts i sent you sure seemed like they had tapered threads to me. That also made no sense to me, but I recovered them from a water pump from a '23 that had set unknown years in a field. That poor car was sunk into the ground and was rotted away except for the drive train. In any case the tapered threads made no sense to me, but i know they came off a '23 water pump. But who know what that car was subjected to in it's 100 years. Thanks again for all your help....to all of you. Lou 1 Link to comment Share on other sites More sharing options...
dibarlaw Posted July 23 Author Share Posted July 23 Lou: My initial problem was how to do the 1 1/8" hex. I do not have a Bridgeport with an indexing head. To do the hex on my shaper would involve multiple set ups, angle settings and delecate work. Looking through some brass plumbing fittings I found some with an 1/1/8" hex close to the height (as close as I could determine from the mangled samples you sent.) The ones I used were reducers for 1" to 3/4" and 1" to 1/2" pipe. The threaded area was done by machining a solid brass 1 3/8" diameter round to .903 and square the shoulder to be able to press on the adapted fitting I bored out the fittings to .900 to give enough to press on to the solid round diameter of .903. I thank my son Mark for the 12 ton press he gave me! You can see where I turned off a 1/4" long surface I left so I could flip the piece, chuck up the piece true to do the inside 30 degree angle that presses against the packing. Using the female packing nuts from my 1925 Master pump to use as a thread gage as Leif recomended. 1 3/8"X 16 tpi. Left and Right hand. They both thread very nicely to the bottom of the 1925 nuts. 5 Link to comment Share on other sites More sharing options...
EmTee Posted July 23 Share Posted July 23 Nice work! Link to comment Share on other sites More sharing options...
Lou McCarrell Posted July 24 Share Posted July 24 Larry, great work! I really appreciate your efforts! PM me with the damages w/ shipping. thanks, lou Link to comment Share on other sites More sharing options...
dibarlaw Posted July 24 Author Share Posted July 24 (edited) Will do Lou. I was not quite sure on how well my press fit would hold up with the thin wall I had to deal with. So I added locktight and 3/32" steel pins. Edited July 24 by dibarlaw (see edit history) 1 Link to comment Share on other sites More sharing options...
dibarlaw Posted July 24 Author Share Posted July 24 I did some wire brushing on the hex as in the previous photos they looked black. 5 Link to comment Share on other sites More sharing options...
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