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2 answers

If you mean a .500-20-UNF-3a, the 20 indicates the number of threads per inch.

2007-05-15 09:11:17 · answer #1 · answered by gatorbait 7 · 0 0

Unf-3a

2016-12-18 10:18:32 · answer #2 · answered by Anonymous · 0 0

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