1/4"-20 Internal Hex Drive Threaded Inserts for Wood - 50 Pieces

SGTBQLL 50 PCS 1/4"-20 x 20mm Threaded Inserts for Wood are designed to create strong, reusable threads in wood for furniture assembly, repair, and woodworking projects. Each insert is made of zinc-plated carbon steel for hardness, wear resistance, and corrosion protection, offering stable joints even after repeated tightening. SpecificationsThread type: 1/4"-20 UNC coarse internal threadTotal length: 20 mm; external diameter: 10.5 mmDrive type: internal hexIncluded tools: 8.5 mm twist drill bit and 6 mm hex spannerCompatibilityFits 1/4"-20 (inch-based) fasteners; not compatible with metric M6 screwsUsable with hardwood, plywood, MDF, and composite boardsInstallation TipsPre-drill a pilot hole slightly deeper than the mating screw (1–2 mm extra depth)Keep the insert vertical and tighten using the included hex spannerFor dense hardwood, slightly enlarge the pilot hole; for softer boards, a small amount of wood glue may be used to increase holding strengthApplicationsFurniture repair and assemblyCabinetry, tables, chairs, and wooden craftsDIY woodworking and restoring stripped holesPackage Contents50 × 1/4"-20 × 20 mm threaded inserts1 × 8.5 mm twist drill bit1 × 6 mm hex spanner

• High-Strength Carbon Steel: Made from premium zinc-plated carbon steel for superior hardness, wear resistance, and corrosion protection, ensuring long-lasting durability for woodworking and furniture applications
• 1/4"-20 UNC Coarse Thread: Features standard 1/4"-20 UNC coarse internal threads providing a secure, tight hold for furniture screws and woodworking bolts; not compatible with metric M6 screws
• Includes a 8.5mm twist drill bit and 6mm hex spanner for easy and accurate installation. Pre-drill a slightly deeper pilot hole, then screw the insert in place for a firm and stable hold — works well even on hardwood or dense materials
• Suitable for furniture repair, cabinetry, tables, chairs, wooden crafts, and woodworking DIY projects; compatible with hardwood, plywood, and composite boards
• Includes 50 threaded inserts, 1 twist drill, and 1 hex spanner, offering good value and convenience for both professionals and DIY users