JYJLLM 8PCS M8 Threaded Inserts for 40x40 Square Tube, Adjustable Leveling Feet, Black Plastic Plug Caster Inserts for Furniture Legs Table Chair End Caps Hardware

• Upgrade your furniture with the JYJLLM 8-piece M8 threaded insert set. Each black plastic plug is designed specifically for 40x40 mm square tubes, providing a secure fitting solution for table legs, chair frames, shelving units, and workbenches. The adjustable leveling foot allows you to compensate for uneven floors, preventing wobbling and ensuring stable support. Whether you are repairing an old dining table or assembling a new custom shelf, these inserts deliver professional-grade results without requiring special tools.
• These square tube end caps feature built-in M8 threading, making them compatible with standard casters and adjustable feet. Simply tap the insert into your tube opening, then screw in your chosen caster or leveling pad. The ribbed design ensures a snug friction fit that holds firmly in place without glue or adhesives. This creates a permanent yet removable solution for furniture mobility or floor protection. Ideal for workshop projects, home renovations, or upgrading existing furniture pieces with damaged or missing feet.
• Hosting a dinner party or holiday gathering? Ensure your tables and chairs stand steady on any surface. These adjustable leveling feet let you fine-tune each leg height individually, eliminating wobbles on uneven patios, wooden decks, or tiled floors. Perfect for Thanksgiving dinner setups, Christmas Eve buffets, or summer barbecue seating arrangements. Your guests will enjoy a stable dining experience without the annoyance of rocking tables or unbalanced chairs. A small upgrade that makes a big difference in entertaining.
• Looking for a practical gift for DIY enthusiasts or new homeowners? This 8-piece hardware kit is an excellent choice for housewarming presents, birthday gifts for adult hobbyists, or Father's Day surprises. Also perfect for workshop owners, furniture makers, or anyone who enjoys weekend repair projects. Each set includes eight complete threaded inserts, ready to install. The durable black plastic construction resists cracking and corrosion, ensuring years of reliable service. Give the gift of functional home improvement.
• Versatile application across multiple furniture types. Use these M8 socket inserts for coffee tables, nightstands, office desks, display racks, workbenches, sofa legs, bed frames, and outdoor patio furniture. They are also great for refreshing second-hand furniture finds or restoring antique pieces with modern functionality. The leveling feature protects your floors from scratches while reducing noise from chair movement. Easy to clean and maintain, these inserts add both value and longevity to your furniture investment.

Reinforce and stabilize your furniture with the JYJLLM 8-piece M8 threaded insert set for 40x40 mm square tubes. These black plastic plug casters are engineered to fit snugly into square tube openings, providing a durable mounting point for adjustable leveling feet or caster wheels. Each insert features precision M8 threading that accepts standard hardware components, allowing you to customize your furniture with mobility or leveling capabilities as needed. The adjustable leveling foot design is particularly useful for uneven surfaces. Whether your dining table sits on a sloped patio, your workbench rests on a garage floor, or your shelving unit wobbles on carpet, these inserts let you dial in perfect balance. Simply tap the insert into the tube end, then thread in the leveling pad. Turn clockwise to extend the foot for additional height, or counter-clockwise to lower it. This fine-tuning capability eliminates rocking and protects floor surfaces from scratches and scuffs. These square tube end caps are ideal for multiple applications: refreshing old chairs, building custom furniture, repairing damaged leg ends, or adding casters to storage racks. They make thoughtful gifts too – perfect for housewarming presents, birthday gifts for DIY lovers, or holiday stocking stuffers for home improvement enthusiasts. The durable black plastic construction resists wear, cracking, and corrosion, ensuring long-lasting performance. Each order includes 8 complete units, enough for a standard four-leg table or chair with spares for future projects. Easy to install and even easier to appreciate.