26 Tpi Thread Chart By Hulik December 17, 2022 Post a Comment 26 Tpi Thread Chart . Symbols list of symbols used in charts and formulas of unified inch. 0.2188 26 0.0385 0.1778 0.0205 0.0064 0.1800 4.6 15. Tpi is only used on us screws, as metric use a very. 14… chart thread tpi