Steel Threaded Inserts for composite materials, hardwood, softwood, and plywood (M4, M5, M6, M8 and M10)

Threaded inserts also known as screw-in sleeves or threaded bushings; are a simple way to add a strong, reusable metric thread into timber and composite boards. Once installed, they create a durable internal thread that’s ideal when you need to assemble and disassemble repeatedly without the fixing loosening or wearing the material.

Designed for hardwood, softwood, plywood, and composite materials, our steel threaded inserts screw into a pre-drilled hole using the coarse external wood thread. The internal metric thread then accepts standard bolts and machine screws, giving you a reliable, serviceable connection that holds up over time—perfect for both workshop use and production builds.

Strong, reusable fixing for furniture and joinery

Threaded inserts are widely used in flat-pack furniture, cabinetry, frames, and timber structures where parts may need maintenance, upgrades, or repeated assembly. They’re also ideal when access is limited and you need a fixing that won’t spin, pull out, or strip as easily as a wood screw.

Easy installation with hex drive

Each insert features a hex (Allen key) drive for quick installation and accurate seating.

1. Drill the correct pilot hole
2. Screw the insert into the timber
3. Fit your bolt or threaded component into the insert
   This creates a tight, dependable fixing that works well for DIY projects, trade installations, and manufacturing.

Available Sizes (Metric Thread)

We stock threaded inserts in multiple thread sizes and lengths to suit different materials and load requirements:

• M4 x 10mm
• M5 x 12mm
• M6 x (12mm | 15mm | 17mm | 20mm | 24mm)
• M8 x (13mm | 15mm | 17mm | 20mm | 24mm | 28mm)
• M10 x (20mm | 25mm)

Threaded inserts are commonly used with furniture connector bolts, hanger bolts (wood-to-metal dowels), and other matching metric threaded fixings.

Manufactured in the EU

Our threaded inserts are manufactured in Europe to high quality standards for consistent sizing, reliable installation, and long-lasting durability.

Import, wholesale, and bulk packs

We supply both small projects and trade customers with flexible quantities. Ideal for importer/wholesaler supply, workshop stock, and production runs, our threaded inserts are available:

• Sold individually
• 100 packs
• 500 packs
• 1000 packs

Looking for regular supply or mixed-size orders? Bulk packs are available for wholesalers with competitive pricing and fast delivery options.