05-23-2023, 01:00 PM
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#15
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Registered User
Join Date: Aug 2014
Location: Santa Fe Springs
Posts: 6
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Re: Locking hubs
Quote:
Originally Posted by Joe P
Here's one of the bolts from the hub on my truck, it's a 66 K20. Head marking are standard, I think the CP is the manufacturer. Numbers IDR, perhaps a date code. The radial lines indicate its a Grade 8 Bolt. I have some reference documents on bolt head markings and will dig them up if you wish. Send me a DM...
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PM coming
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