 Northwest kansas | Frame bolt, always black in color and really expensive. Flange bolt.
Edit: We have a shop that stretches trucks, and they have a whole bolt bin dedicated to frame bolts. They are a black, grade 8 bolt that I think is usually serrated on the flange, along with the nuts being a flanged crimp locking nut.
Edited by justbad7 5/26/2023 22:04
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