Threaded Adapter For 7/8" Square Tubing & 5/16"-18 Threaded Stems

Threaded Adapter for 7/8" Square Tubing & 5/16"-18 Threaded Stems Part # 3BA212 This threaded adapter insert allows you to attach a caster or foot/glide to the bottom of square tubing, commonly used in tables & shelving. It fits flush when installed & is designed for 7/8" square tubing, measured across the outside from one side to the other. Thread: 5/16"-18 Square or Round Tubing: Designed for square tubing, can accommodate round tubing, but ends will stick out.  Length: 7/8" Width: 7/8"