Methodology guide
Limits, grip matching, and when to stop shopping this ladder.
Calculator
Rivet nut tool sizing calculator
Enter the largest metric rivet-nut size needed as an integer M size (3, 4, 5, 6, 8, 10, or 12). Get kit class 6 / 10 / 12. Confirm mandrels/SAE; match grip to sheet; wear eye protection.
Result
Worked check: metric 5 → class 6; metric 8 → class 10; metric 12 → class 12. Listed sizes only. Confirm mandrels/SAE on the listing; match grip range to sheet thickness; wear eye protection.
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