4-pack of Plastic Rigid Base Stud Mount Adjustable Leveling Foot: Threaded Stud Mount, 1.500 in Threads, 1.375 in Base Diameter. Rigid Base Stud Mount Leveling Foot has a 1.375" rigid base for mounting machinery, tables, appliances, or conveyors. Base Diameter:1.375 in (34.9 mm) Base Height:.375 in (9.5 mm) Thread Length:1.500 in (38.1 mm) Thread Size:1/4-20 Thread Material:Steel Coating:Zinc Plated