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04-02-2022, 01:31 PM
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#1 |
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Senior Member
 
Join Date: Jul 2000
Location: North Texas
Posts: 3,425
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Starter stud nut size
My 69 C10 has a rebuilt OE-type starter that I installed around 20 years ago. It's still going strong but I'm in the process of installing new, larger gauge battery cables.
Turns out the battery stud on the starter has 3/8-16 threads, but the hex nut takes a 15mm wrench, and it's a tight fit. Seems to me that what I've got here is a nut that needs a 19/32" wrench, which I don't have. The nut appears to be copper, so I want to re-use it. I'll be able to use a 5/8" wrench to snug up the nut, and then a 15mm wrench to tighten it. But I wanted to see if anyone else had run into this. I do remember nuts on electrical terminals, like on coils, were sometimes 11/32", etc., which is why we had ignition wrench sets, but I don't remember starter nuts with 19/32" hex heads. Strange, huh?
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Mike 1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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04-02-2022, 01:44 PM
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#2 |
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Registered User
Join Date: Mar 2015
Location: washington
Posts: 2,161
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Re: Starter stud nut size
The results of outsourcing from the least expensive source. I would just put the nut in a vise and file each flat down till it fit the 5/8 wrench. Will not take long, with a good file, as the copper files easily.
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04-02-2022, 03:29 PM
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#3 |
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Senior Member
Join Date: Jul 2000
Location: North Texas
Posts: 3,425
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Re: Starter stud nut size
Turns out the stud and nut are 10x1.50mm. The nut has only 3 threads which is why it would thread onto a 3/8-16 bolt.
__________________
Mike 1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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