rmaynard 15,516 #1 Posted October 14, 2022 It's been about 4 years since I disassembled my 701 with a Delco Remy starter/generator. I have misplaced a box or bin of hardware that contained a lot of the unique nuts and bolts. Among the missing is the nut and washer that holds the double pulley onto the starter/generator. I have been unable to find the size, so I'm putting the question up here. What is the size and thread pitch of that nut? Thanks in advance. Share this post Link to post Share on other sites
squonk 41,158 #2 Posted October 14, 2022 I got a loose nut (No Joke!) I'll check 1 1 Share this post Link to post Share on other sites
Ed Kennell 38,231 #3 Posted October 14, 2022 3 minutes ago, squonk said: I got a loose nut This could get interesting. 1 5 Share this post Link to post Share on other sites
squonk 41,158 #4 Posted October 14, 2022 (edited) 5/8" 20 USS thread! Thin nut also. 1/4" thick Edited October 14, 2022 by squonk 2 1 Share this post Link to post Share on other sites
squonk 41,158 #5 Posted October 14, 2022 4 minutes ago, Ed Kennell said: This could get interesting. Anyone who doesn't know that I have a loose nut hasn't been paying attention. Just ask Waldo! 8 Share this post Link to post Share on other sites
rmaynard 15,516 #6 Posted October 14, 2022 10 minutes ago, squonk said: 5/8" 20 USS thread! Thin nut also. 1/4" thick Thanks. That what I always thought, but my vernier calipers say otherwise. I get a reading of 21/32" on the threads. Share this post Link to post Share on other sites
squonk 41,158 #7 Posted October 14, 2022 (edited) 21 minutes ago, rmaynard said: Thanks. That what I always thought, but my vernier calipers say otherwise. I get a reading of 21/32" on the threads. My digitals say .65" which is 21/32" . Now do you think Delco would have spec'd a 21/32" thread? I think not. Mc Master Carr doesn't have 21/32" nuts so in my mind they don't exist. I see 17mm X 1.25 nuts listed for Delco gens and alternators. .65" is 16.7MM I find it hard to believe Delco used a metric nut way back when Edited October 14, 2022 by squonk Share this post Link to post Share on other sites
rmaynard 15,516 #8 Posted October 14, 2022 Just sayin'. McMaster doesn't have 5/8-20. 5/8 - 11 5/8 - 18 5/8 - 24 I'll go count threads. Share this post Link to post Share on other sites
squonk 41,158 #9 Posted October 14, 2022 1 minute ago, rmaynard said: Just sayin'. McMaster doesn't have 5/8-20. 5/8 - 11 5/8 - 18 5/8 - 24 I'll go count threads. You're right. I found 5/8 20 taps and dies. Maybe it is 17 1.25 mm. do you have a metric thread tap? Share this post Link to post Share on other sites
squonk 41,158 #10 Posted October 14, 2022 (edited) I just measured the threads with my metric thread gauge. 1.25 it is. Looks like you need 17mm X 1.25 thread about 6.5mm thick. Learn something new every day. My Grandmother would say you stop learning things once you're dead! Edited October 14, 2022 by squonk 2 1 Share this post Link to post Share on other sites
squonk 41,158 #11 Posted October 14, 2022 Now why would they make 5/8 x 20 taps and dies but not bolts and nuts? 1 Share this post Link to post Share on other sites
ri702bill 8,347 #12 Posted October 14, 2022 3 minutes ago, squonk said: Now why would they make 5/8 x 20 taps and dies but not bolts and nuts? Maybe it was an E-lectrical thing, like the no more seen 12-24 thread...?? 1 Share this post Link to post Share on other sites
Achto 27,609 #13 Posted October 14, 2022 (edited) 1 hour ago, ri702bill said: Maybe it was an E-lectrical thing, like the no more seen 12-24 thread...?? I have a 12-24 tap that I use to turn 10-24 nuts into 12-24 nuts. The correct size thread for the small terms on a Delco Remy starter/generator. Edited October 14, 2022 by Achto 1 1 Share this post Link to post Share on other sites
953 nut 55,324 #14 Posted October 14, 2022 3 hours ago, Achto said: I have a 12-24 tap that I use to turn 10-24 nuts into 12-24 nuts. The correct size thread for the small terms on a Delco Remy starter/generator. Always wondered what that 12-24 tap was doing in my set now I know. 1 1 Share this post Link to post Share on other sites
WHX?? 48,833 #15 Posted October 15, 2022 (edited) They are 5/8-24.. I got some from McMaster. Think they were in the jam nut isle. I might have a extra one one I could send you Bob since I am a SG freak. .. haveta look. I had some that had messed up threads and didn’t want to chance messing up the threads on a armature. Tractor buddy of Dan and mine say they are some kinda weird machinist thread. I did find those post nuts in the Hillman drawers once Dan. They were even 7teenths wrench size...I crs what store tho... Kinda like those SS jam nuts in 1/2-13 for the top of 701/702 steering pins I found once ... I gotta start writing this crap down... Edited October 15, 2022 by WHX?? 1 Share this post Link to post Share on other sites
WHX?? 48,833 #16 Posted October 15, 2022 8 hours ago, squonk said: I got a loose nut (No Joke!) I'll check 8 hours ago, Ed Kennell said: This could get interesting. Not even going there but could 'cause Ed is more useful than Squonky... lets just make sure Bob gets nutted.... 2 Share this post Link to post Share on other sites
squonk 41,158 #17 Posted October 15, 2022 (edited) This has been bugging me. If you look up Delco generator pulley nuts E bay lists them as 17MM X1.25 so I went out with my thread gauge. The shaft measures.65" or 21/32" . 65 is 16.6MM. My eyes aren't the best but to me 20 threads US and 1.25 metric fit better than US 24. Gen shaft is out of a 702 Edited October 15, 2022 by squonk 1 1 Share this post Link to post Share on other sites
dclarke 4,032 #18 Posted October 15, 2022 From looking around the internet I’ve see these specs for the shaft thread size. 1 Share this post Link to post Share on other sites
