Industries Double Star Threaded Caster Insert Heat Treated Steel Fits 1-1/4 Inch Square 16-18 Gauge Tube Thread: 3/8-16 100 Pack

These steel threaded caster inserts are specifically engineered to be inserted into square legs, providing a deep setting that remains securely in place. They feature a 3/8-16 thread, typically used with correspondingly stemmed casters, and flush fittings offer a neat and simple finish. Designed to fit into 1-1/4 inch square tubes (outside dimension) of various gauges (16 to 18 gauge). They enable casters to smoothly roll over thresholds, extension cords, and more without being displaced, suitable for use in industrial, commercial, and residential settings. Constructed from heat-treated hardened steel for enhanced durability when correctly installed