Simpson 4 x 11 Joist Hanger Skewed Left, Galvanized HSUL4.12/11 PACK:1 Ea What does the 14/18 TPI

What does the 14/18 TPI designation mean on these blades

Model Number: LGUM210-2-SDS

and long-lasting performance

and dimensional stability

Simpson 4 x 11 Joist Hanger Skewed Left, Galvanized HSUL4.12/11 PACK:1 Ea What does the 14/18 TPISimpson 4 x 11 Joist Hanger Skewed Left, Galvanized HSUL4. 12 11 is a heavy duty, 45 degree skewed U shaped hanger from Simpson Strong Tie, engineered to support large joist members or double I joists in wood construction. The HSUL encapsulates the top flange of the joist, eliminating the need for web stiffeners in standard installations making it a reliable, time saving solution for complex framing angles. Key Features 45 degree skewed left (HSUL)