Double Star Threaded Caster Insert In Heat Treated Steel For One And One Quarter Inch Square Tubing Fits Sixteen To Eighteen Gauge Three Eighths Inch By Sixteen Threads Per Inch Flush Mount For Secure Installation Pack Of Four

Double Star Threaded Caster Insert for Square Tubes (4 Pack)
✔️ Fits 1-1/4 in square tubes; 3/8-16 thread; heat-treated steel; 4-pack

These heat-treated steel caster inserts are designed to install into square legs or frames to accept threaded casters. They’re ideal for industrial carts, workbenches, and mobile equipment in workshops, warehouses, and garages.

✅ Fits 1-1/4 in square tube (16-18 gauge)
✅ Thread 3/8-16 for common casters
✅ Heat-treated hardened steel for durability
✅ Double star design sits deep in tube for secure seating
✅ Edges flush with tubing for clean appearance

💡 What is a caster insert and why is it used with square tubing?

In general, a caster insert provides a threaded anchor inside square tubing to accept casters, enabling mobility for carts, benches and industrial frames.

- Provides a threaded mount for casters - Fits 1-1/4 in square tubes (16-18 gauge) exactly - Uses standard 3/8-16 thread for broad compatibility - Deep-set design minimizes pull-out and wobble