1-1/2" 3/8-16 Outdoor Rated Stainless Steel Allen head bolt
3/8-16 1-1/2" Stainless Steel Allen Head Bolt
3/8-16 x 2" Allen head bolt
3/8-16 x 2-1/2"Allen head bolt
The T-nut to choose for commercial high use, steep walls, and roof sections.