You May Also Like. 3/8 Universal Thick Mount Plate Skid Steer Loader W/ 2 Removable Hay Spear Holes 3000LBS. About The Loader Mount Plate. Grade 50 steel exhibits more efficient corrosion resistance. Made from Grade 50 steel that exhibits tough hardness and peak strength; Coupled with a black powder surface coating that features excellent corrosion resistance to ensure long-lasting durability,… Read more →